[smoore]

Hate to say it, but:

Freaky network performance under Windows? FFR.

(Fdisk, Format, Reinstall)

It's actually an answer in some of the MS help pages and although it sounds like a lot of work for a non-tech it's the quickest and easiest solution when dealing with these kinds of problems. I'm sure I'll be flamed for it soon because I recommend it all the time... It usually works.

Some of the better windows geeks may be able to help more if you post windows version, etc.