My search engine topic link redirects to another seach engine and wont go back HELP?

I have checked for virus's

My search engine topic link redirects to another seach engine and wont go back HELP?microsoft flight simulator

Have you checked for spyware? Spybot Search and Destroy has an option to return home pages and search options all back to default. Do it after you remove the spyware, also check adaware by lavasoft.