My ME system became corrupt and wouldn't boot. I decided to take the opportunity to upgrade to XP Pro and purchased the latest version. I installed it over the ME system so that I retained all my existing files. It seems to have worked OK except I cannot get any ICONs on my desktop, except for the Recycle Bin, and the start menu/programs does not show many programs. Should I have formatted the hard drive and installed XP cleanly? I do have the critical data backed up.