diff --git a/misc/build.func b/misc/build.func
index d736a4090ee..6a26d1f4ab5 100644
--- a/misc/build.func
+++ b/misc/build.func
@@ -65,36 +65,36 @@ root_check() {
 }
 
 # This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/archlinux-vm.sh b/vm/archlinux-vm.sh
index 2eae37e82ec..a0689b99855 100644
--- a/vm/archlinux-vm.sh
+++ b/vm/archlinux-vm.sh
@@ -138,36 +138,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/debian-vm.sh b/vm/debian-vm.sh
index 0642800d860..7773e6992db 100644
--- a/vm/debian-vm.sh
+++ b/vm/debian-vm.sh
@@ -138,36 +138,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/docker-vm.sh b/vm/docker-vm.sh
index c7f1fe3006d..2cb92d9348b 100644
--- a/vm/docker-vm.sh
+++ b/vm/docker-vm.sh
@@ -139,36 +139,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/haos-vm.sh b/vm/haos-vm.sh
index 26b82305640..85455192180 100644
--- a/vm/haos-vm.sh
+++ b/vm/haos-vm.sh
@@ -142,36 +142,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/mikrotik-routeros.sh b/vm/mikrotik-routeros.sh
index 21b5a300779..942c9976e7a 100644
--- a/vm/mikrotik-routeros.sh
+++ b/vm/mikrotik-routeros.sh
@@ -139,36 +139,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/nextcloud-vm.sh b/vm/nextcloud-vm.sh
index 62ad1ea5699..7bf3524bdc2 100644
--- a/vm/nextcloud-vm.sh
+++ b/vm/nextcloud-vm.sh
@@ -138,36 +138,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/openwrt.sh b/vm/openwrt.sh
index aad2fc08f4a..bf0d7d7182b 100644
--- a/vm/openwrt.sh
+++ b/vm/openwrt.sh
@@ -184,36 +184,37 @@ function msg_error() {
   echo -e "${BFR} ${CROSS} ${RD}${msg}${CL}"
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/opnsense-vm.sh b/vm/opnsense-vm.sh
index 57abada7f5b..7ddd6acc4c5 100644
--- a/vm/opnsense-vm.sh
+++ b/vm/opnsense-vm.sh
@@ -180,36 +180,37 @@ function msg_error() {
   echo -e "${BFR} ${CROSS} ${RD}${msg}${CL}"
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/owncloud-vm.sh b/vm/owncloud-vm.sh
index 689d7b23cab..8d17ff1523c 100644
--- a/vm/owncloud-vm.sh
+++ b/vm/owncloud-vm.sh
@@ -139,36 +139,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/pimox-haos-vm.sh b/vm/pimox-haos-vm.sh
index 09852a80d81..f69d9a7b4d2 100644
--- a/vm/pimox-haos-vm.sh
+++ b/vm/pimox-haos-vm.sh
@@ -147,36 +147,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/ubuntu2204-vm.sh b/vm/ubuntu2204-vm.sh
index 7405ca070f9..44b4b03957f 100644
--- a/vm/ubuntu2204-vm.sh
+++ b/vm/ubuntu2204-vm.sh
@@ -134,36 +134,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/ubuntu2404-vm.sh b/vm/ubuntu2404-vm.sh
index af4c4c81c04..37914773b1f 100644
--- a/vm/ubuntu2404-vm.sh
+++ b/vm/ubuntu2404-vm.sh
@@ -137,36 +137,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/ubuntu2504-vm.sh b/vm/ubuntu2504-vm.sh
index 0e335594447..c5d431f6fc4 100644
--- a/vm/ubuntu2504-vm.sh
+++ b/vm/ubuntu2504-vm.sh
@@ -136,36 +136,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }
 
diff --git a/vm/umbrel-os-vm.sh b/vm/umbrel-os-vm.sh
index 2ba58dcf748..e9f75f609da 100644
--- a/vm/umbrel-os-vm.sh
+++ b/vm/umbrel-os-vm.sh
@@ -138,36 +138,37 @@ function check_root() {
   fi
 }
 
+# This function checks the version of Proxmox Virtual Environment (PVE) and exits if the version is not supported.
+# Supported: Proxmox VE 8.0.x – 8.9.x and 9.0 (NOT 9.1+)
 pve_check() {
   local PVE_VER
   PVE_VER="$(pveversion | awk -F'/' '{print $2}' | awk -F'-' '{print $1}')"
 
-  # Check for Proxmox VE 8.x
+  # Check for Proxmox VE 8.x: allow 8.0–8.9
   if [[ "$PVE_VER" =~ ^8\.([0-9]+) ]]; then
     local MINOR="${BASH_REMATCH[1]}"
-    if ((MINOR < 1 || MINOR > 4)); then
+    if ((MINOR < 0 || MINOR > 9)); then
       msg_error "This version of Proxmox VE is not supported."
-      echo -e "Required: Proxmox VE version 8.1 – 8.4"
+      msg_error "Supported: Proxmox VE version 8.0 – 8.9"
       exit 1
     fi
     return 0
   fi
 
-  # Check for Proxmox VE 9.x (Beta) — require confirmation
+  # Check for Proxmox VE 9.x: allow ONLY 9.0
   if [[ "$PVE_VER" =~ ^9\.([0-9]+) ]]; then
-    if whiptail --title "Proxmox 9.x Detected (Beta)" \
-      --yesno "You are using Proxmox VE $PVE_VER, which is currently in Beta state.\n\nThis version is experimentally supported.\n\nDo you want to proceed anyway?" 12 70; then
-      msg_ok "Confirmed: Continuing with Proxmox VE $PVE_VER"
-      return 0
-    else
-      msg_error "Aborted by user: Proxmox VE 9.x was not confirmed."
+    local MINOR="${BASH_REMATCH[1]}"
+    if ((MINOR != 0)); then
+      msg_error "This version of Proxmox VE is not yet supported."
+      msg_error "Supported: Proxmox VE version 9.0"
       exit 1
     fi
+    return 0
   fi
 
   # All other unsupported versions
   msg_error "This version of Proxmox VE is not supported."
-  echo -e "Supported versions: Proxmox VE 8.1 – 8.4 or 9.x (Beta, with confirmation)"
+  msg_error "Supported versions: Proxmox VE 8.0 – 8.x or 9.0"
   exit 1
 }