system hangs during check disk

I had this problem, when I tried to run a full check disk, or a check
disk with with the auto fix enable (this requires you restart your
computer), the computer would hang, and restart. I would eventually end
up with a recovery screen where I would have to select "use last known
configuration that worked".

I noticed that there seems to be a lot of people having this problem.

Here's what I finally did that got it working; I run spysweeper, zone
alarm (free version), and a norton antivirus. When I turned all of these
off before re-booting, the scandisk worked just fine. I don't know which
one of these programs was interfering with the scan, if I had to guess I
would think spysweeper, or zone alarm the most likely suspects. I got
the idea to do this from another post I found suggesting that you
uninstall zone alarm. Obviously, you don't want to be connected to the
internet when you disable all this stuff. I'm behind a router firewall.

I hope other find this info usefull.

Paul.