diff --git a/functions/private/Set-WinUtilService.ps1 b/functions/private/Set-WinUtilService.ps1
index 8be5525efd..46d9232abd 100644
--- a/functions/private/Set-WinUtilService.ps1
+++ b/functions/private/Set-WinUtilService.ps1
@@ -33,7 +33,10 @@ Function Set-WinUtilService {
 
         # Service exists, proceed with changing properties -- while handling auto delayed start for PWSH 5
         if (($PSVersionTable.PSVersion.Major -lt 7) -and ($StartupType -eq "AutomaticDelayedStart")) {
-            sc.exe config $Name start=delayed-auto
+            sc.exe config $Name start= delayed-auto
+            if ($LASTEXITCODE -ne 0) {
+                throw "sc.exe config failed with exit code $LASTEXITCODE"
+            }
         } else {
             $service | Set-Service -StartupType $StartupType -ErrorAction Stop
         }
diff --git a/functions/public/Invoke-WPFFixesUpdate.ps1 b/functions/public/Invoke-WPFFixesUpdate.ps1
index 4d7cfcefa4..7fc04550c2 100644
--- a/functions/public/Invoke-WPFFixesUpdate.ps1
+++ b/functions/public/Invoke-WPFFixesUpdate.ps1
@@ -114,9 +114,9 @@ function Invoke-WPFFixesUpdate {
     if (Test-Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate") {
         Write-Progress -Id 0 -Activity "Repairing Windows Update" -Status "Removing WSUS client settings..." -PercentComplete 60
         Write-Progress -Id 6 -ParentId 0 -Activity "Removing WSUS client settings" -PercentComplete 0
-        Start-Process -NoNewWindow -FilePath "REG" -ArgumentList "DELETE", "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate", "/v", "AccountDomainSid", "/f" -RedirectStandardError "NUL"
-        Start-Process -NoNewWindow -FilePath "REG" -ArgumentList "DELETE", "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate", "/v", "PingID", "/f" -RedirectStandardError "NUL"
-        Start-Process -NoNewWindow -FilePath "REG" -ArgumentList "DELETE", "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate", "/v", "SusClientId", "/f" -RedirectStandardError "NUL"
+        Remove-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" -Name "AccountDomainSid" -ErrorAction SilentlyContinue
+        Remove-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" -Name "PingID" -ErrorAction SilentlyContinue
+        Remove-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" -Name "SusClientId" -ErrorAction SilentlyContinue
         Write-Progress -Id 6 -ParentId 0 -Activity "Removing WSUS client settings" -Status "Completed" -PercentComplete 100
     }
 
diff --git a/functions/public/Invoke-WPFImpex.ps1 b/functions/public/Invoke-WPFImpex.ps1
index b3c0ae16dd..5748811a02 100644
--- a/functions/public/Invoke-WPFImpex.ps1
+++ b/functions/public/Invoke-WPFImpex.ps1
@@ -73,9 +73,17 @@ function Invoke-WPFImpex {
                         Write-Error "Failed to load the JSON file from the specified path or URL: $_"
                         return
                     }
-                    # TODO how to handle old style? detected json type then flatten it in a func?
-                    # $flattenedJson = $jsonFile.PSObject.Properties.Where({ $_.Name -ne "Install" }).ForEach({ $_.Value })
-                    $flattenedJson = $jsonFile
+                    if ($null -ne $jsonFile -and $jsonFile.PSObject.Properties['Install']) {
+                        Write-WinUtilLog -Component "Impex" -Message "Detected legacy WinUtil config structure; flattening import object."
+                        $flattenedJson = @()
+                        foreach ($prop in $jsonFile.PSObject.Properties) {
+                            if ($prop.Name -ne "Install" -and $null -ne $prop.Value) {
+                                $flattenedJson += @($prop.Value)
+                            }
+                        }
+                    } else {
+                        $flattenedJson = $jsonFile
+                    }
 
                     if (-not $flattenedJson) {
                         [System.Windows.MessageBox]::Show(
diff --git a/pester/ui-state.Tests.ps1 b/pester/ui-state.Tests.ps1
index 1f2809f002..b7a0e77cfd 100644
--- a/pester/ui-state.Tests.ps1
+++ b/pester/ui-state.Tests.ps1
@@ -271,6 +271,30 @@ Describe "Invoke-WPFImpex import selection state" {
         Should -Invoke -CommandName Write-Error -Times 0 -Exactly
     }
 
+    It "imports legacy selection groups without treating Install metadata as a selection" {
+        $legacyConfigPath = Join-Path $TestDrive "legacy-config.json"
+        [ordered]@{
+            Install = @(
+                [pscustomobject]@{
+                    winget = "Git.Git"
+                    choco = "git"
+                }
+            )
+            WPFInstall = @("WPFInstallGit")
+            WPFTweaks = @("WPFTweaksTelemetry")
+            WPFToggle = @("WPFToggleDarkMode")
+            WPFFeature = @("WPFFeatureSandbox")
+        } | ConvertTo-Json -Depth 4 | Set-Content -LiteralPath $legacyConfigPath
+
+        Invoke-WPFImpex -type "import" -Config $legacyConfigPath
+
+        @($script:sync.selectedApps) | Should -Be @("WPFInstallGit")
+        @($script:sync.selectedTweaks) | Should -Be @("WPFTweaksTelemetry")
+        @($script:sync.selectedToggles) | Should -Be @("WPFToggleDarkMode")
+        @($script:sync.selectedFeatures) | Should -Be @("WPFFeatureSandbox")
+        Should -Invoke -CommandName Write-Error -Times 0 -Exactly
+    }
+
     It "preserves selections and does not reset the UI after an invalid import" {
         $script:sync.selectedApps.Add("WPFInstallExisting")
         $script:sync.selectedTweaks.Add("WPFTweaksExisting")