Ok, got the bug again today and tried userdump. This is the message it returned:
Dumping process 1188 (ashWebSv.exe) to c:\ashWebSv.dmp...
The process could not be dumped.
Access is denied.
I am running Windows XP Pro with Administrator access.
I was not running anything different from what I normally run every day. There was one slight difference today. I was still able to get to google.com and make successful searches on the site. However, result links I clicked still would not load.
Edit: Looks like this is because I didn't disable the web service first. I will do that next time it happens (another week if past occurrences are any indication). I see there's another thread open on this now, and it seems to have better info. I'll post on it.