Fix install location missing in uninstall registry entry

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

installer/PowerToysSetup/Product.wxs

@@ -80,6 +80,7 @@
       <ComponentGroupRef Id="MonacoSRCHeatGenerated" />
       <ComponentGroupRef Id="WorkspacesComponentGroup" />
       <ComponentGroupRef Id="CmdPalComponentGroup" />
+      <ComponentRef Id="UninstallRegistryComponent" />
     </Feature>
 
     <SetProperty Id="ARPINSTALLLOCATION" Value="[INSTALLFOLDER]" After="CostFinalize" />
@@ -513,6 +514,15 @@
     <Binary Id="PTCustomActions" SourceFile="$(var.PowerToysSetupCustomActions.TargetPath)" />
   </Fragment>
 
+  <!-- Ensure InstallLocation is set in uninstall registry -->
+  <Fragment>
+    <Component Id="UninstallRegistryComponent" Guid="*" Directory="INSTALLFOLDER">
+      <RegistryKey Root="$(var.RegistryScope)" Key="Software\Microsoft\Windows\CurrentVersion\Uninstall\[ProductCode]">
+        <RegistryValue Name="InstallLocation" Type="string" Value="[INSTALLFOLDER]" />
+      </RegistryKey>
+    </Component>
+  </Fragment>
+
   <!-- Installation directory structure -->
   <Fragment>
     <Directory Id="TARGETDIR" Name="SourceDir">

installer/PowerToysSetupVNext/Product.wxs

@@ -67,6 +67,7 @@
       <ComponentGroupRef Id="MonacoSRCHeatGenerated" />
       <ComponentGroupRef Id="WorkspacesComponentGroup" />
       <ComponentGroupRef Id="CmdPalComponentGroup" />
+      <ComponentRef Id="UninstallRegistryComponent" />
     </Feature>
 
     <SetProperty Id="ARPINSTALLLOCATION" Value="[INSTALLFOLDER]" After="CostFinalize" />
@@ -254,6 +255,15 @@
     <Binary Id="PTCustomActions" SourceFile="$(var.PowerToysSetupCustomActionsVNext.TargetPath)" />
   </Fragment>
 
+  <!-- Ensure InstallLocation is set in uninstall registry -->
+  <Fragment>
+    <Component Id="UninstallRegistryComponent" Guid="*" Directory="INSTALLFOLDER">
+      <RegistryKey Root="$(var.RegistryScope)" Key="Software\Microsoft\Windows\CurrentVersion\Uninstall\[ProductCode]">
+        <RegistryValue Name="InstallLocation" Type="string" Value="[INSTALLFOLDER]" />
+      </RegistryKey>
+    </Component>
+  </Fragment>
+
   <!-- Installation directory structure -->
   <Fragment>
       <StandardDirectory Id="$(var.DefaultInstallDir)">

tools/Verification scripts/verify-installation-script.ps1

@@ -202,12 +202,13 @@ function Test-PowerToysInstallation {
         if ($powerToysEntry) {
             Add-CheckResult -Category "Registry" -CheckName "Uninstall Registry Entry ($Scope)" -Status 'Pass' -Message "PowerToys uninstall entry found with DisplayName: $($powerToysEntry.DisplayName)"
             
-            # Note: InstallLocation may or may not be set in the uninstall registry
-            # This is normal behavior as PowerToys uses direct file references for system bindings
+            # InstallLocation should be set in the uninstall registry as of installer version fixing issue #41638
             if ($powerToysEntry.InstallLocation) {
                 Add-CheckResult -Category "Registry" -CheckName "Install Location Registry ($Scope)" -Status 'Pass' -Message "InstallLocation found: $($powerToysEntry.InstallLocation)"
             }
-            # No need to report missing InstallLocation as it's not required
+            else {
+                Add-CheckResult -Category "Registry" -CheckName "Install Location Registry ($Scope)" -Status 'Fail' -Message "InstallLocation is missing from uninstall registry entry. This may indicate an installer issue."
+            }
         }
         else {
             Add-CheckResult -Category "Registry" -CheckName "Uninstall Registry Entry ($Scope)" -Status 'Fail' -Message "PowerToys uninstall entry not found in Windows uninstall registry"
@@ -246,8 +247,8 @@ function Get-PowerToysInstallPath {
         return $InstallPath
     }
     
-    # Since InstallLocation may not be reliably set in the uninstall registry,
-    # we'll use the default installation paths based on scope
+    # Try to get path from registry first, fall back to default paths if needed
+    # InstallLocation should be reliably set as of installer version fixing issue #41638
     if ($Scope -eq 'PerMachine') {
         $defaultPath = "${env:ProgramFiles}\PowerToys"
     }