Default Homepage and Search Engine Keep Changing

darsben wrote:
Have you gone into options and deleted the unwanted search engines from the list? tools>internet options>General>search. Delete all unwanted search engines shown leaving just the one you want to use. After restarting IE go to options again then programs then mange add-ons and under search providers get rid of any strays that maybe hiding there.

I've done that many times. Google always reappears and makes itself the default search engine, and msm.com makes itself the homepage.