How bout a non-destructive reinstall of windows? I have done this several times and it has saved me as many times.
This is not my article. It is from the Information Week newsletter I get. I hope this is ok to post like this.
If not just let me know, I'll take it down and post a link instead.
(edit) I have decided to remove this post to prevent copyright infringement. I have a letter into the editor for permission to post this on TBCS. If granted I will post the entire article in the tutorial section. In the mean time here is a link to the original post.
Langa Letter: XP's No-Reformat, Nondestructive Total-Rebuild Option
http://www.informationweek.com/news/...leID=189400897