I am currently running windows XP and everything has been running smoothly up until now. The START bar at the bottom of the screen has gone from looking like XP to looking like windows 98. Also there are a host of windows programs that will no longer function, such as , media cantre, any sounds, search, etc. The really frustrating thing is that the Windows Restore won't run so that I can restore to a previous date, I get to the last window where it says that the restore is undoable and click next to say restore and nothing. I really want to avoid re-formatting, is there anyone who can help me please.