are you using? MS Validation has trouble with anything except IE.
THIS...is totally nuts. For a long time, I couldn't validate XP or download anything from microsoft.com A Microsoft tech lurking in a forum there helped me fix it by posting a DNS address change message that lots of folks were VERY grateful for. I didn't think about this again until I installed Vonage, then went to microsoft.com to download something unrelated...and found that I no longer could validate and download.
A Vonage tech gave me new addresses to try...and that worked. For ONE DAY. Now, I'm back to square one--can't validate, can't download.
WHAT can I do now?!