code:

---

If @InWin = 1
  Shell "%COMSPEC% RD /S /Q %TEMP%"
EndIf 
If @InWin = 2
  Shell "%COMSPEC% DelTree /Y %TEMP%"
EndIf 

---

Just another way of doing the job if you don't want to call functions outside the script
(You need at least kix version 3.62 to run this script)

code:

---

CD %TEMP%
GoSub DelTmpDir
Return ; Script finished

; **************************
        elTmpDir
; **************************
Dim $SubDir
$FileName = Dir("*.*")
While $FileName <> "" And @Error = 0
  If SubStr($FileName, 1, 1) <> "."
    If GetFileAttr($FileName) & 16
      $SubDir = $FileName
      CD $SubDir
      GoSub DelTmpDir
      CD ".."
      $FileName = Dir("*.*")
      While $FileName <> $SubDir
        $FileName = Dir()
      Loop
      $Err = SetFileAttr($SubDir, 128)
      RD $SubDir     ; Delete subdirectory, now empty
    Else
      $Err = SetFileAttr($FileName, 128)
      Del $FileName
    EndIf
  EndIf
  $FileName = Dir()
Loop
Return
; *** END SUB DelTmpDir ***

---