Internet Explorer closes down when I press submit/login

[The Tool]

For example mail.yahoo.com, when I enter my user/password and press Sign In, Internet Explorer closes down.

This happens everywhere including this forum.

I have run latest Ad-aware, Norton and TrendMicro's web based scanner.

Can't seem to understand what's wrong.

[LooseChippings]

Have a read of this Microsoft Knowledge Base Article 154036

http://support.microsoft.com/default.aspx?scid=154036