added new function Get-GUIDFromMSIUninstallString

added new function Uninstall-MSI

Tools.ps1

@@ -795,5 +795,60 @@ Function Get-AbsoluteURI {
     Return [System.Net.HttpWebRequest]::Create($URL).GetResponse().ResponseUri.AbsoluteUri
 }
 
+Function Get-GUIDFromMSIUninstallString ([string]$str) {
+    $start = $str.IndexOf('{') + 1
+    $end = $str.IndexOf('}')
+    Return $str.Substring($start, $end - $start)
+}
+
+Function Uninstall-MSI ([string]$APP_NAME) {
+
+    # Get all of the uninstall registry keys
+    $UNINSTALL_KEYS = Get-ChildItem -Path HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
+    $UNINSTALL_KEYS += Get-ChildItem -Path HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall
+
+    # Track whether an app was uninstalled or not
+    $PRODUCTUNINSTALLED = $false
+
+    Foreach ( $reg in $UNINSTALL_KEYS ) {
+        # Get the uninstall key
+        $REG_PROPERTY = Get-ItemProperty -Path $reg.PSPath
+
+        # Get the display name of the app
+        $DISPLAY_NAME = $REG_PROPERTY.DisplayName
+
+        # Get the UninstallString
+        $UNINSTALLSTRING = $REG_PROPERTY.UninstallString
+
+        # Get the ModifyPath
+        $MODIFYPATH = $REG_PROPERTY.ModifyPath
+
+        # Make sure the DisplayName matches what we're looking for
+        If ( $DISPLAY_NAME -ilike $APP_NAME ) {
+            # Make sure the software was installed using an MSI
+            If ( $REG_PROPERTY.WindowsInstaller -eq 1 ) {
+                # Get the product code from the UninstallString
+                If ( $UNINSTALLSTRING ) { $PRODUCT_CODE = $(Get-GUIDFromMSIUninstallString -str $UNINSTALLSTRING) }
+
+                # Get the product code from the ModifyPath
+                ElseIf ( $MODIFYPATH ) { $PRODUCT_CODE = $(Get-GUIDFromMSIUninstallString -str $MODIFYPATH) }
+
+                # Uninstall the app
+                If ( $PRODUCT_CODE ) {
+                    LogMsg "Uninstalling ${DISPLAY_NAME} ${PRODUCT_CODE}"
+                    $arguments = '/X{' + $PRODUCT_CODE + '} /qn /norestart'
+                    Try { Start-Process -FilePath "msiexec.exe" -ArgumentList $arguments -Wait ; $PRODUCTUNINSTALLED = $true }
+                    Catch { LogErr $_.Exception.Message }
+                }
+            }
+            Else {
+                LogMsg "Cannot uninstall ""${DISPLAY_NAME}""`n                      UninstallString: ${UNINSTALLSTRING}"
+            }
+        }
+    }
+
+    If ( $PRODUCTUNINSTALLED -eq $false ) { LogMsg "No product matching ${APP_NAME} was found"}
+}
+
 Setup-MSPDirectories
 Setup-LogFile