Scott, here's a "house cleaning" and general "computer health" protocol - 10
steps and a few extra points:
http://aumha.org/a/health.htm
If you need to do other troubleshooting of Windows itself, here are generic
steps that usually prove fruitful:
http://aumha.org/a/tshoot.htm
I suspect this is all you'll need to get rolling - as a developer, you have
the kind of mind that can run with this sort of thing once you have a
pointer, I suspect - but if you have any more questions, don't hesitate to
post back. It usually helps to have the complete verbatim text of the error
messages, btw.

Signature
Jim Eshelman, MS-MVP Windows http://aumha.org/
AumHa Forums: http://forum.aumha.org/
The Parasite Fight: http://aumha.org/a/parasite.htm
Computer Health: http://aumha.org/a/health.htm
Troubleshooting: http://aumha.org/a/tshoot.htm
> Someone asked me to troubleshoot some problems they are
> having with a couple of computers.
[quoted text clipped - 12 lines]
>
> Any advice is GREATLY appreciated. Thanks!