Your first problem is you are using IE (closely followed by running XP! ) Have you thought of using something different like Mozilla? (www.mozilla.org)

Internet Explorer is intimately connected with the operating system, has a vast number of acknowledged security problems and obtains it's configuration information (including your name) from the operating system.

While I am aware that none of this affects the problem which you originally posted about (no idea why that's happening), if you are concerned about your own security and privacy (which you obviously are or you wouldn't be on AO), switching browsers is a small and easy step to increasing your security.

cheers

Jupes