After cleaning up a 9 year old Dell Dimension 8100 running XP sp3, I defragmented and then closed thinking all was well. When I opened today all the printing is in symbols rather than letters. Can't read any menus or buttons, so I don't know what to do. Tried safe mode and the same problem. No system restore point available. Since I can't read anything, I can't back up. Can I just do a clean reinstall. Only disk I have is a reinstallation CD of XP SP2 from dell. Computer was originally ME, but I upgraded to XP in 2005. Anyone help!?