I was cleaning the cookies out of Internet Explorer, but I deleted "files" instead. I cannot undelete these things because all exe files are screwed up. The start menu is empty, Norton 2004 can't run, and I am tearing my hair out. Safe mode does not help (surprise, surprise), and I even tried reinstalling. It doesn't boot from the XP disc, and I even tried a reinstall from DOS. That did nothing, but took six hours. I am typing this on my son's Powerbook G4 (sigh).