System File Checker is a great utility that is typically not utilized by the average Windows XP User. What it does is scan system files that are protected by Windows File Protection (by default Windows File Protection is enabled), and it checks to make sure that the protected files have not been altered. If it finds that a protected file has been altered, it will replace the file with the proper file.

If you are troubleshooting a windows problem or error, running the System File Checker, should be first check. The nice thing about the System File Checker is that it is a tool that isn