Definitely not an Exchange question but you go into Windows Update, go to the list of installed updates and there should be an option to uninstall updates, including IE9. Please mark as helpful if you find my contribution useful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.

I have a HP Compaq, about 3-4 years old with Vista. I recently changed IE 7 to IE 9 with horrible results, how can I switch back ???

Definitely not an Exchange question but you go into Windows Update, go to the list of installed updates and there should be an option to uninstall updates, including IE9. Please mark as helpful if you find my contribution useful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.

Agreed. By the way, for further question, I would suggest you seek the solution in the Internet Explorer Forum: http://social.technet.microsoft.com/Forums/en-US/ieitprocurrentver/threadsFrank Wang TechNet Community Support