Has your father tried defragging his hard drive? I don't know whether that would help, but it's worth a try. A Disk Cleanup wouldn't come amiss either. You can find both Disk Cleanup and Disk Defragmenter by going to Start>All Programs >Accessories>System Tools.
Madeline.
-------------------- "Power tends to corrupt, and absolute power corrupts absolutely." Lord Acton, 1887.