Re: Wipe My Computer..
MurkCity, your question doesn't make sense. You can't wipe the hard drive without removing the Operating System.
If you mean cleaning the data, then you have to Add/Remove the applications from Control Panel, and delete files from Documents and Settings, My Documents, Temp Directories etc etc.
Unless you have a recovery CD that came with the Dell. You could probably, reinstall the original OS clean - but this again contradicts your original question.