Implement admin permission checks for update installer

Co-authored-by: yeelam-gordon <73506701+yeelam-gordon@users.noreply.github.com>

src/Update/PowerToys.Update.cpp

@@ -201,6 +201,13 @@ int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
 
     if (action == UPDATE_NOW_LAUNCH_STAGE1)
     {
+        // Check if user has admin permissions before proceeding
+        if (!check_user_is_admin())
+        {
+            Logger::error("Update failed: Administrator permissions required to install updates");
+            return 1;
+        }
+
         bool isUpToDate = false;
         auto installerPath = ObtainInstaller(isUpToDate);
         bool failed = !installerPath.has_value();
@@ -217,6 +224,12 @@ int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
     }
     else if (action == UPDATE_NOW_LAUNCH_STAGE2)
     {
+        // Check if user has admin permissions before proceeding
+        if (!check_user_is_admin())
+        {
+            Logger::error("Update failed: Administrator permissions required to install updates");
+            return 1;
+        }
         using namespace std::string_view_literals;
         const bool failed = !InstallNewVersionStage2(args[2]);
         if (failed)

src/settings-ui/Settings.UI/SettingsXAML/Views/GeneralPage.xaml

@@ -102,6 +102,14 @@
                             IsTabStop="{x:Bind ViewModel.IsNoNetwork, Mode=OneWay}"
                             Severity="Error" />
 
+                        <!--  Insufficient permissions error  -->
+                        <InfoBar
+                            x:Uid="General_InsufficientPermissions"
+                            IsClosable="False"
+                            IsOpen="{x:Bind ViewModel.IsInsufficientPermissions, Mode=OneWay}"
+                            IsTabStop="{x:Bind ViewModel.IsInsufficientPermissions, Mode=OneWay}"
+                            Severity="Error" />
+
                         <!--  New version available  -->
                         <InfoBar
                             x:Uid="General_NewVersionAvailable"

src/settings-ui/Settings.UI/Strings/en-us/Resources.resw

@@ -2414,6 +2414,9 @@ From there, simply click on one of the supported files in the File Explorer and
   <data name="General_CantCheck.Title" xml:space="preserve">
     <value>Network error. Please try again later</value>
   </data>
+  <data name="General_InsufficientPermissions.Title" xml:space="preserve">
+    <value>Administrator permissions required. Please restart PowerToys as administrator to install updates.</value>
+  </data>
   <data name="General_DownloadAndInstall.Content" xml:space="preserve">
     <value>Download &amp; install</value>
   </data>

src/settings-ui/Settings.UI/ViewModels/GeneralViewModel.cs

@@ -260,6 +260,7 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
         private bool _isNewVersionDownloading;
         private bool _isNewVersionChecked;
         private bool _isNoNetwork;
+        private bool _isInsufficientPermissions;
         private bool _isBugReportRunning;
 
         private bool _settingsBackupRestoreMessageVisible;
@@ -953,6 +954,14 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
             }
         }
 
+        public bool IsInsufficientPermissions
+        {
+            get
+            {
+                return _isInsufficientPermissions;
+            }
+        }
+
         public bool IsBugReportRunning
         {
             get
@@ -1178,6 +1187,18 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
 
         private void UpdateNowClick()
         {
+            // Check if user has admin permissions before starting update
+            if (!IsAdmin)
+            {
+                _isInsufficientPermissions = true;
+                NotifyPropertyChanged(nameof(IsInsufficientPermissions));
+                return;
+            }
+
+            // Clear any previous permission error
+            _isInsufficientPermissions = false;
+            NotifyPropertyChanged(nameof(IsInsufficientPermissions));
+
             IsNewVersionDownloading = string.IsNullOrEmpty(UpdatingSettingsConfig.DownloadedInstallerFilename);
             NotifyPropertyChanged(nameof(IsDownloadAllowed));
 
@@ -1299,6 +1320,11 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
 
                 _isNoNetwork = PowerToysUpdatingState == UpdatingSettings.UpdatingState.NetworkError;
                 NotifyPropertyChanged(nameof(IsNoNetwork));
+                
+                // Clear permission error when updating state changes
+                _isInsufficientPermissions = false;
+                NotifyPropertyChanged(nameof(IsInsufficientPermissions));
+                
                 NotifyPropertyChanged(nameof(IsNewVersionDownloading));
                 NotifyPropertyChanged(nameof(IsUpdatePanelVisible));
                 _isNewVersionChecked = PowerToysUpdatingState == UpdatingSettings.UpdatingState.UpToDate && !IsNewVersionDownloading;