My computer keeps randomly changing back to my log on screen, the screen for windows xp that allows u to choose which user name you want to log into. It keeps doing it, especially when I type something. I dunno wut the problem is. Is anybody experiencing the same thing? Im pretty sure it isnt a hardware problem. I haven't installed any programs recently and when I do virus and spyware scans with my pc cillin 2005 the results are clear. Should I just reformat? Has any1 installed Win XP Pro or Longhorn yet? How does it run? I'm thinkin about reformatting with one fo those OS just for the hell of it.