This forum is provided for community support of Lunarpages customers. I see your post is on at least 6 other sites. Are you a Lunarpages customer?
Update: I see you have removed all but one of the other posts, which date back 6 or more years. Even though it's not directly a Lunarpages hosting question, how to test on multiple versions of IE on one computer is an interesting question with implications for web developers, so this thread has not been removed as spam.
A partial answer is that Microsoft deliberately and illegally integrated IE deeply into the operating system, so that it could not be pulled out and be replaced by a Third Party product (e.g., Firefox or Chrome). This was to screw EU regulators in their antitrust action. Although fortunately it is possible to install someone else's browser, it's impossible to remove IE (and presumably its replacement, Edge) and as a side effect, you can't install multiple versions on one machine. So, buy yourself another PC (and another Windows license, for a different version) if you want to work on multiple IE versions.