WMDC Causing PFN List Corrupt crash?

Vista Ultimate
WMDC ver 6.1

Up until two days ago, all was working fine. All of a sudden, WMDC stopped
recognizing my phone (Pantech PN-820). After rebooting the phone and the PC,
still no sync. Uninstalled WMDC. When I tried to reinstall WMDC, I got the
PFN List Corrupt blue screen and my system shut down. Now, I'm getting all
kinds of errors showing up involving Windows Live OneCare, iTunes, etc.

Anyone have any clues as to what might be the culprit?

Thanks!

Hi RockDawg,

With that combination of errors, there is a possibility of errors with your
hard drive. Can you run a chkdsk on it?

RockDawg, also thoroughly test your RAM. Use Vista's Memory Diagnostics,
and also run memtest www.memtest.org

Thanks for both suggestions. Will do that and let you know how I made out.