I must be doing something wrong I've only got an overclocke P4 2.6(running at 3.0) with 1gb ram (Ineed more) on XP and O.k. sometimes it freezes but most the time it's fine. As for e-mail i use Incredimail. I have to defrag at most once a month. If you want a superb drive cleaner use Dustbuster. It's in Italian but it frees a heluva lot of drive space. Other than that make sure you use NTFS as it needs defragging less often. How hot is your processor running?