Adjusted unsupported OS detection

.bin/Scripts/functions/sw_diags.py

@@ -41,39 +41,6 @@ def check_connection():
         abort()
 
 
-def check_for_outdated_os(show_alert=False):
-  """Checks if the current OS is supported, returns bool.
-
-  NOTE: Preview Builds are considered outdated even if newer than
-        the latest stable release. This is done for simplicity and
-        because preview builds are only valid for a short timeframe.
-  """
-  msg = ''
-  needs_updated = False
-  preview_build = False
-
-  # Check OS version/notes
-  os_info = global_vars['OS'].copy()
-  if os_info['Notes'] == 'unsupported':
-    needs_updated = True
-  elif os_info['Version'] == '10' and os_info['Notes'] == 'preview build':
-    preview_build = True
-  elif os_info['Version'] == '10' and os_info['Notes'] == 'outdated':
-    needs_updated = True
-
-  # Show alert
-  if preview_build:
-    msg = 'Preview builds are not officially supported'
-  elif needs_updated:
-    msg = 'The installed version of Windows is outdated'
-  if msg and show_alert:
-    msg += '\n\nPlease consider upgrading before continuing setup.'
-    show_alert_box(msg)
-
-  # Done
-  return needs_updated or preview_build
-
-
 def check_secure_boot_status(show_alert=False):
   """Checks UEFI Secure Boot status via PowerShell."""
   boot_mode = get_boot_mode()
@@ -136,6 +103,33 @@ def get_boot_mode():
   return type_str
 
 
+def os_is_unsupported(show_alert=False):
+  """Checks if the current OS is unsupported, returns bool."""
+  msg = ''
+  unsupported = False
+
+  # Check OS version/notes
+  os_info = global_vars['OS'].copy()
+  if os_info['Notes'] == 'unsupported':
+    msg = 'The installed version of Windows is no longer supported'
+    unsupported = True
+  elif os_info['Notes'] == 'preview build':
+    msg = 'Preview builds are not officially supported'
+    unsupported = True
+  elif os_info['Version'] == '10' and os_info['Notes'] == 'outdated':
+    msg = 'The installed version of Windows is outdated'
+    unsupported = True
+  if 'Preview' not in msg:
+    msg += '\n\nPlease consider upgrading before continuing setup.'
+
+  # Show alert
+  if unsupported and show_alert:
+    show_alert_box(msg)
+
+  # Done
+  return unsupported
+
+
 def run_autoruns():
   """Run AutoRuns in the background with VirusTotal checks enabled."""
   extract_item('Autoruns', filter='autoruns*', silent=True)

.bin/Scripts/new_system_setup.py

@@ -40,8 +40,7 @@ if __name__ == '__main__':
     clear_screen()
 
     # Check installed OS
-    os_needs_updated = check_for_outdated_os(show_alert=True)
-    if os_needs_updated:
+    if os_is_unsupported(show_alert=True):
       print_warning('OS version not supported by this script')
       if not ask('Continue anyway? (NOT RECOMMENDED)'):
         abort()