I have the dreaded "dw20.exe" process running wild on my Windows Server 2008. This is Dr. Watson error reporting, and when it comes up, it absolutely pegs the CPU.
It's a known problem and there are several solutions...for every OS except Server 2008, it seems. Here's the Microsoft KB topic on it:
http://support.microsoft.com/kb/841477
That has a list of registry keys to change, but they don't exist in Server 2008 (it was written for everything up to 2003). I did find a "PCHealth" key somewhere else in the registry, but I try not to just root around and change stuff randomly.
Any ideas?