Windoze XP ?? Try reinstalling, right over existing, then you can go the repair route or do a full install, without having access to your system it seems that either some of your ntsys or win32 files or both may be compromised ...Updated your AntiV lately ???
Um, I did update it a couple of weeks ago. I'm pretty sure it may be a virus. I was thinking about restoring the computer, but I don't know if that will erase some important files I've saved on here recently.