BleepingComputer.com: Windows Memory Diagnostics Tool - Cannot Get Past It

I've got a doozy of a problem going on here:

I've got a Vista Ultimate x64 installation. I wanted to check on my memory usage (I have 4 GB, and set my BIOS to recognize all four gigs), so I decided to schedule Windows Memory Diagnostics Tool to run on an immediate restart. It looks like I'm not detecting any problems with my RAM, but the test always runs the number of passes I specify (2 by default, but any other number as well) and then RESETS back to 1 of X passes complete and overall test status of 0%.

I'm unable to exit the test to boot normally by hitting ESC (it does nothing; just resets test progress to zero and option defaults).

I've tried a system restore after accessing my boot options by hitting F8 and booting from my Ultimate DVD; it seems that the problem is mdsched.exe got set to run the test on start-up, and since I'm never able to exit the test, mdsched.exe runs during boot up every time.

I basically don't know how I can get past this Windows Memory Diagnostics Tool. Can anyone please, please help me?

2 suggestions:
1) Boot from the Vista DVD and have it launch Startup Repair: http://www.bleepingcomputer.com/tutorials/repair-windows-with-windows-startup-repair/
2) Boot into Safe Mode and edit the registry to remove the key that affects this (you could this free utility to scan the startups: http://www.microsoft.com/technet/sysintern...s/Autoruns.mspx )

Other hints that I've found reference to are:
- press X to break out of the loop: http://ogasawalrus.com/blog/node/392
- registry edits and boot edits here: http://www.daniweb.com/forums/thread89750.html
- run chkdsk from the Vista Startup Repair disk: http://www.techspot.com/vb/all/windows/t-3...oting-loop.html