|It is the registry that is corrupted, & because each registry is different on different machines you cannot just copy one over. You need to a saved copy from within the poorly machine so you have two options:|
Use the repair console as described HERE - it does involve a bit of command-line stuff, but nothing major. Check this link anyway as it tells you the locations of the files you need to replace.
Alternatively you can use a live Linux disk (Your Puppy, Ubuntu or Kaspersky Rescue disk for example) - boot from that & then use its file manager to replace the corrupted file(s) from the repair folder, make sure you rename the original files before copying the repair ones over, just in case.
Note that it is worth doing all 4 registry files whilst you are there as it's not uncommon to have more than one of the files corrupted.
After all of this, do a scan of your harddrive for errors - something must have caused the problem in the first place.
"I've always been mad, I know I've been mad, like the most of us..." Pink Floyd