Mols I have to tell you about 2 months ago I ran a Win 7 checkdisk just for the heck of it , actually my boot time was a little slow,and I was unable to boot up after. I ended up having to do a total reimage, which was a pain in the rump.
I dont know what happened but I'll never run a check disk again I can tell you that. It took me 1/2 a day just to get the system to accept the Win 7 install disk again and the system wouldnt accept a repair.
Before and after it was and has been a well running system. Except for the previous boot time.
Sometime messing with Windows is a can of worms. Ive tried to get out of the habit of tinkering.