constant 401 errors, all sites, all users

From: Duncan A. McRae (google.com_at_mcrae.ca)
Date: 05/21/03 

Date: 21 May 2003 14:24:31 -0700

... even from within the network, logged on as a Global Admin/Domain
Admin &tc. I also can't connect to the $ shares anymore. Have I
inadvertently installed a crazy patch on my system (I have Windows
Update set to "automatically install updates and notify me".

I've looked through this group, but didn't see anything that seemed to
relate. I've ensured that the IUSR account has access, that anonymous
access is enabled, and that Authentication is turned off.

Help!

TIA;
Duncan