Hit Start > Find > Files or Folders & in the Named box , type ( or copy & paste ) the following exactly as it appears (but it is not case-sensitive), and without any spaces:
*.tmp,~*.*,*.chk
Make sure the Look-In box contains the hard drive from which your applications run, usually (C

. Make sure the Include Subfolders checkbox is checked . Hit Find Now .
When the little magnifying glass stops, searching has completed and you can see how many files were found at the bottom of the dialog box.
On your keyboard, hold your Ctrl key down and hit the letter "a"; this selects all the files that were found. Hit your delete key and say Yes when asked if you want to send all the files to the recycle bin.
If you are asked if you are sure you want to delete a file because it is a program that you will not be able to run again, or because it is a read-only file, say Yes. Program files do not start with a squiggly line (~ it's called a tilde - till-duh), nor do they end with "tmp."
If you are unable to delete some of the files, hit Ctrl-Alt-Delete and End Task on everything in the list EXCEPT Explorer and Systray.
(It is okay to End Task on your antivirus software because you will be rebooting your PC, which should restart your antivirus software again.)
Once you have ended all of the tasks (except Explorer and Systray), try selecting (ctrl-a) and deleting the files again. It is usually okay to leave several files in there if you are unable to delete them.
Run Scandisk Thorough then Defrag .