Cleaning up the Windows XP temp folder from the Windows explorer is a tedious task especially if you have thousands of files inside it.
In order to clean it up quickly, you can use a cleanup windows software or open the command line and enter the following four commands:
cd %tmp% rd /s . cd %windir%/temp rd /s .
These commands will remove all of the temp folders content efficiently (Do not worry if you see some files are not deleted because they are currently used by the system, in order to delete these set of files, just restart your system and re-execute these commands again).