I have a pc that will be running and then all of a sudden it will restart. Sometimes it does this several times in a row. It may be a disk error, but I ran a diagnostic and it passed. I ran check disk but it says it cannot run. I'll have to try it again and post what it says exactly. Would this have to do with my disk only having 11gb free out of 80?? I'll have to move a bunch of stuff from it and see if that improves anything.