From c1a64639857f2ec04c4f312301754c3e54aba011 Mon Sep 17 00:00:00 2001
From: Ben Whitmore <44303264+byteben@users.noreply.github.com>
Date: Fri, 22 Nov 2024 10:30:32 +0000
Subject: [PATCH] Proactive Remediation scripts to replace missing ARP registry
 values

---
 .../Get-EdgeWebView2Detection.ps1             | 104 ++++++++++++++++
 .../Set-EdgeWebView2Detection.ps1             | 116 ++++++++++++++++++
 2 files changed, 220 insertions(+)
 create mode 100644 PowerShell/EdgeWebView2/Get-EdgeWebView2Detection.ps1
 create mode 100644 PowerShell/EdgeWebView2/Set-EdgeWebView2Detection.ps1

diff --git a/PowerShell/EdgeWebView2/Get-EdgeWebView2Detection.ps1 b/PowerShell/EdgeWebView2/Get-EdgeWebView2Detection.ps1
new file mode 100644
index 0000000..44ce3a3
--- /dev/null
+++ b/PowerShell/EdgeWebView2/Get-EdgeWebView2Detection.ps1
@@ -0,0 +1,104 @@
+<#
+.SYNOPSIS
+
+Script to detect and validate the installation of Microsoft Edge WebView2 Runtime.
+Checks registry entries and installation folder to ensure the WebView2 Runtime is properly installed and functional.
+Outputs "Remediation Required" or "Remediation Not Required" based on validation results.
+
+.NOTES
+
+Created on:   2024-11-21
+Created by:   Ben Whitmore @PatchMyPC
+Filename:     Get-EdgeWebView2Detection.ps1
+
+---------------------------------------------------------------------------------
+LEGAL DISCLAIMER
+
+The PowerShell script provided is shared with the community as-is
+The author and co-author(s) make no warranties or guarantees regarding its functionality, reliability, or suitability for any specific purpose
+Please note that the script may need to be modified or adapted to fit your specific environment or requirements
+It is recommended to thoroughly test the script in a non-production environment before using it in a live or critical system
+The author and co-author(s) cannot be held responsible for any damages, losses, or adverse effects that may arise from the use of this script
+You assume all risks and responsibilities associated with its usage
+---------------------------------------------------------------------------------
+#>
+
+[CmdletBinding()]
+param ()
+
+# Define constants
+$registryPath = "HKLM:\SOFTWARE\wow6432node\Microsoft\Windows\CurrentVersion\Uninstall"
+$edgeWebViewInstallLocation = "C:\Program Files (x86)\Microsoft\EdgeWebView\Application"
+$versionRegex = '\d+\.\d+\.\d+\.\d+'
+$binaryName = "msedgewebview2.exe"
+$remediationRequired = $false
+
+try {
+
+    # Retrieve all subkeys in the uninstall registry path
+    Write-Verbose "Retrieving subkeys from registry path: $registryPath"
+    $subkeys = Get-ChildItem -Path $registryPath -ErrorAction Stop
+    Write-Verbose "Found $($subkeys.Count) subkeys in the registry path."
+
+    # Loop through subkeys to find the matching app
+    foreach ($subkey in $subkeys) {
+        $regProperties = Get-ItemProperty -Path $subkey.PSPath -ErrorAction Stop
+
+        # Check if the registry entry matches the install location
+        if ($regProperties.InstallLocation -eq $edgeWebViewInstallLocation) {
+            Write-Verbose "Matching install location found: $edgeWebViewInstallLocation"
+
+            # Validate the version folder and binary existence
+            Write-Verbose "Checking for version folder in: $edgeWebViewInstallLocation"
+            $installedVersion = Get-ChildItem -Path $edgeWebViewInstallLocation -Directory | Where-Object { $_.Name -match $versionRegex } | Select-Object -First 1
+
+            if ($installedVersion) {
+                Write-Verbose "Version folder found: $($installedVersion.Name)"
+                $binaryPath = Join-Path -Path $edgeWebViewInstallLocation -ChildPath "$($installedVersion.Name)\$binaryName"
+
+                if (-not (Test-Path -Path $binaryPath)) {
+                    Write-Verbose "'$binaryName' is missing in folder: $($binaryPath)"
+                    $remediationRequired = $true
+                }
+                else {
+                    Write-Verbose "'$binaryName' exists in folder: $($binaryPath)"
+                }
+            }
+            else {
+                Write-Verbose "No valid version folder found in: $edgeWebViewInstallLocation"
+                $remediationRequired = $true
+            }
+
+            # Ensure DisplayName exists and has a value
+            if (-not $regProperties.PSObject.Properties["DisplayName"] -or [string]::IsNullOrWhiteSpace($regProperties.DisplayName)) {
+                Write-Verbose "DisplayName is missing or empty."
+                $remediationRequired = $true
+            }
+            else {
+                Write-Verbose "DisplayName exists: $($regProperties.DisplayName)"
+            }
+
+            # Ensure UninstallString exists and has a value
+            if (-not $regProperties.PSObject.Properties["UninstallString"] -or [string]::IsNullOrWhiteSpace($regProperties.UninstallString)) {
+                Write-Verbose "UninstallString is missing or empty."
+                $remediationRequired = $true
+            }
+            else {
+                Write-Verbose "UninstallString exists: $($regProperties.UninstallString)"
+            }
+        }
+    }
+
+    # Output remediation status
+    if ($remediationRequired) {
+        Write-Output "Remediation Required"
+        exit 1
+    }
+    else {
+        Write-Output "Remediation Not Required"
+        exit 0
+    }
+}
+catch {
+    $_.Exception.Message
+}
\ No newline at end of file
diff --git a/PowerShell/EdgeWebView2/Set-EdgeWebView2Detection.ps1 b/PowerShell/EdgeWebView2/Set-EdgeWebView2Detection.ps1
new file mode 100644
index 0000000..633dc97
--- /dev/null
+++ b/PowerShell/EdgeWebView2/Set-EdgeWebView2Detection.ps1
@@ -0,0 +1,116 @@
+<#
+.SYNOPSIS
+
+Script to fix the installation of Microsoft Edge WebView2 Runtime.
+Microsoft removed the DisplayName and UninstallString from the registry key for WebView2 Runtime in a recent version. 
+This script will add or restore the DisplayName and UninstallString to the registry key if they are missing or incorrect.
+
+.NOTES
+
+Created on:   2024-11-21
+Created by:   Ben Whitmore @PatchMyPC
+Filename:     Set-EdgeWebView2Detection.ps1
+
+---------------------------------------------------------------------------------
+LEGAL DISCLAIMER
+
+The PowerShell script provided is shared with the community as-is
+The author and co-author(s) make no warranties or guarantees regarding its functionality, reliability, or suitability for any specific purpose
+Please note that the script may need to be modified or adapted to fit your specific environment or requirements
+It is recommended to thoroughly test the script in a non-production environment before using it in a live or critical system
+The author and co-author(s) cannot be held responsible for any damages, losses, or adverse effects that may arise from the use of this script
+You assume all risks and responsibilities associated with its usage
+---------------------------------------------------------------------------------
+#>
+[CmdletBinding()]
+param ()
+
+# Define constants
+$registryPath = "HKLM:\SOFTWARE\wow6432node\Microsoft\Windows\CurrentVersion\Uninstall"
+$edgeWebViewInstallLocation = "C:\Program Files (x86)\Microsoft\EdgeWebView\Application"
+$versionRegex = '\d+\.\d+\.\d+\.\d+'
+$displayName = "Microsoft Edge WebView2 Runtime"
+$uninstallStringTemplate = "Installer\setup.exe --uninstall --msedgewebview --system-level --verbose-logging"
+$remediationResults = @()
+
+# Initialize remediation status
+$remediationSuccess = $true
+
+try {
+
+    # Retrieve all subkeys in the uninstall registry path
+    Write-Verbose "Retrieving subkeys from registry path: $registryPath"
+    $subkeys = Get-ChildItem -Path $registryPath -ErrorAction Stop
+    Write-Verbose "Found $($subkeys.Count) subkeys in the registry path."
+
+    # Loop through subkeys to find the matching app
+    foreach ($subkey in $subkeys) {
+        $regProperties = Get-ItemProperty -Path $subkey.PSPath -ErrorAction Stop
+
+        # Check if the registry entry matches the install location
+        if ($regProperties.InstallLocation -eq $edgeWebViewInstallLocation) {
+            Write-Verbose "Matching install location found: $edgeWebViewInstallLocation"
+
+            # Ensure UninstallString exists and has a value
+            $installedVersion = Get-ChildItem -Path $edgeWebViewInstallLocation -Directory | Where-Object { $_.Name -match $versionRegex } | Select-Object -First 1
+
+            if ($installedVersion) {
+                Write-Verbose "Found installed version: $($installedVersion.Name)"
+                $uninstallString = Join-Path -Path $edgeWebViewInstallLocation -ChildPath "$($installedVersion.Name)\$uninstallStringTemplate"
+            }
+            else {
+                Write-Verbose "WARNING: No valid version folder found in: $edgeWebViewInstallLocation"
+                $remediationResults += "No valid version folder found in: $edgeWebViewInstallLocation"
+                $remediationSuccess = $false
+            }
+
+            # Ensure DisplayName exists and has a value
+            if (-not $regProperties.PSObject.Properties["DisplayName"] -or [string]::IsNullOrWhiteSpace($regProperties.DisplayName)) {
+                try {
+                    Set-ItemProperty -Path $subkey.PSPath -Name "DisplayName" -Value $displayName
+                    Write-Verbose "Added DisplayName to the registry key: $($subkey.PSPath)"
+                }
+                catch {
+                    Write-Verbose "WARNING: Failed to add DisplayName to the registry key: $($subkey.PSPath)"
+                    $remediationResults += "Failed to add DisplayName to the registry key: $($subkey.PSPath)"
+                    $remediationSuccess = $false
+                }
+            }
+            else {
+                Write-Verbose "DisplayName already exists: $($regProperties.DisplayName)"
+            }
+
+            # Ensure UninstallString exists and has a value
+            if (-not $regProperties.PSObject.Properties["UninstallString"] -or [string]::IsNullOrWhiteSpace($regProperties.UninstallString) -or $regProperties.UninstallString -ne $uninstallString) {
+                try {
+                    Set-ItemProperty -Path $subkey.PSPath -Name "UninstallString" -Value $uninstallString
+                    Write-Verbose "Added or updated UninstallString to the registry key: $($subkey.PSPath) with version $($installedVersion.Name)"
+                }
+                catch {
+                    Write-Verbose "WARNING: Failed to add or update UninstallString to the registry key: $($subkey.PSPath)"
+                    $remediationResults += "Failed to add or update UninstallString to the registry key: $($subkey.PSPath)"
+                    $remediationSuccess = $false
+                }
+            }
+            else {
+                Write-Verbose "UninstallString already exists and is correct: $($regProperties.UninstallString)"
+            }
+        }
+            
+    }
+}
+catch {
+    $remediationResults += $_.Exception.Message
+    $remediationSuccess = $false
+}
+
+# Output result and exit with the appropriate status code
+if ($remediationSuccess) {
+    Write-Output "Remediation completed successfully."
+    exit 0
+}
+else {
+    Write-Output "Remediation failed"
+    Write-Output $remediationResults
+    exit 1
+}
\ No newline at end of file