The Automatic Crash Recovery (ACR) feature of Internet Explorer 8 helps prevent the loss of work in the unlikely event of browser failure. ACR takes advantage of the Loosely Coupled Internet Explorer (LCIE) feature to provide new crash recovery capabilities—including tab recovery—that minimize interruptions to a browsing session.
This is just apart of IE 8. I haven't came upon any ways to disable it. As long as you use IE 8 this is just one of the sometimes convenient but also sometimes annoying features. The only way to remove these process' is to go in manually and remove iexplore.exe or reboot your system after using IE 8. If this feature becomes a big problem I recommentd switching your Internet Browser as I recently did. I currently use Opera but there are plenty more such as Safari, Firefox, or Google Chrome, all in which rank better than IE 8, and are all free.
Hope this helps you.