How to Delete temporary files in Windows XP

In this video it is demonstrated that how to delete temporary files in Windows XP. There are two different methods for deleting temporary files. First of all go to and click "start" then go to "run" and type temp now click on ok, then a window will appear, in this window there are all useless files, select all files and delete it. Now the other method is go to "run" and type %TEMP%, after clicking ok a window will appear in which there are useless folders and files, select all folders and files and delete it. Some times there are files which will not be deleted, leave those files and delete rest files.