Unlocker

This is a really neat program. Have you ever tried to delete a file or folder and get this message?

Cannot delete file: Access is denied
There has been a sharing violation.
The source or destination file may be in use.
The file is in use by another program or user.
Make sure the disk is not full or write-protected and that the file is not currently in use.

Well this free program will unlock the file and allow you to delete, stop or modify it. I used it for the file atapi.sys, which is needed to install Service Pack 3. It can also be useful for removing harmful files from your PC. You can download and read more on this program from http://ccollomb.free.fr/unlocker/