remove oldest shadow copy

Cleanup-SystemTempFiles.ps1

@@ -109,15 +109,18 @@ If ( Test-Path $ESDB ) {
 $ADSKInst = "${Env:SystemDrive}\Autodesk"
 If ( Test-Path $ADSKInst ) {
     $foldersToDelete = Get-ChildItem -Path $ADKSInst -ErrorAction SilentlyContinue | Where-Object { ($_.PSIsContainer) -and ($_.LastWriteTime -lt ((Get-Date) - $TimeDelta)) -and ( $_.Name -ne "WI") }
-    ForEach ( $folder in $foldersToDelete ) {
-        $path = $folder.FullName
+    ForEach ( $f in $foldersToDelete ) {
+        $path = $f.FullName
         Write-Output "Deleting Autodesk installer directory: ""${path}"""
-        Try { Remove-Item $folder -Force -Recurse -ErrorAction SilentlyContinue }
+        Try { Remove-Item $f -Force -Recurse -ErrorAction SilentlyContinue }
         Catch { Write-Error $_.Exception.Message }
     }
 }
 
-# TODO: Evaluate system restore points and delete them if they take up too much space
+# Delete the oldest shadow copies if there are more than 1
+$SystemVolume = Get-CimInstance -ClassName Win32_Volume -ErrorAction SilentlyContinue | Where-Object { $_.Name -like "${Env:SystemDrive}\" }
+$ShadowCopies = Get-CimInstance -ClassName Win32_ShadowCopy | Where-Object { $_.VolumeName -like $SystemVolume.DeviceID }
+If ( $ShadowCopies.Length -gt 1 ) { vssadmin delete shadows /For=$Env:SystemDrive /Oldest /Quiet }
 
 # Remove files from user profile directories
 ForEach ( $userProfile in $(Get-UserProfiles) ) {