I have an XP machine. I run nothing in the "background". I can have no applications running except necessary Windows apps, and Norton AV. My compute is using 239 of 256Meg of its memory. How can this be? My computer is running slower than usual since I have noticed this. I have no viruses and take very good care of my computer. I am in IT, but mostly networking, so I am not as familiar about this sort of issue as say a programmer would be.