Frequent error while loading page 'HTTP 400 Bad Request'

Hello,

My internet explorer is giving an error, it's: HTTP 400 Bad Request
Description: Invalid Verb

First time I noticed it, it happened when attempted to log in into yahoo, i cannot access my email anymore due to this problem
I can access and read my email from gmail, but it wont allow me to sent emails as i would get the same error.
I cannot get into Microsoft support website as it wont allow me to search within the site for this problem.

The error also happen with many more websites.

I have run a full antivirus scan, full antispyware scan, I have done a system restore Nothing helps!

My antivirus is Norton Internet Security Pro
My antispyware is Spybot Search & Destroy
My firewall is TrendMicro Internet Security Pro
Windows Vista Home Premium 64 bit

Please help! I cannot find a solution for this!

I had that problem after installing "Windows Live OneCare Family Safety" that came with Windows Live Messenger . So I uninstalled this component. Now everything works fine. I can visit any web page now.

I also had this problem and it turned out to be caused by the 'family safety' part of 'windows live' - had to uninstall 'family safety' to resolve the issue.

I found the same thing with vista and ebay. You guys fied it for me!!! thanks so much - windows wanted to charge me to fix their errors!!!!! CRAZY WORLD!!!