TIP-How to perform an in-place upgrade (reinstallation) of Windows XP

I have been asked this question a lot lately. Well, not exactly this question, but the problems that have been explained require that a re-installation of windows may solve the problems, since this completely reinstall the windows system files WITHOUT disrupting the other programs installed, it can quite often be used to cleanup a computer that was seriously infected with spyware/malware that has since been removed (using tools available on the SOFTWARE/SUPPORT page). Microsoft has many support pages but it nice to know exactly where to look and so I hope this helps. I have a similar and quite possibly more layman's terminology of this on the TIPS page found here.