Internet explorer appears when it wants and now with gross oppressive porno. Please tell me how I can get it off my computer, it does not appear in my programs and the one file I have will not let me dump it

You have malware on your computer, it is not the browser's fault. Download and install Malwarebytes.org (http://www.malwarebytes.org/mbam.php) in safe Mode for best results. Then install Firefox and make it your default browser.