Hi, just wondering if anyone can help me out with a problem -

When i try to access google, a completely different website comes up on the screen called 'bigfeet media solutions' rather than the google homepage (even though in the explorer bar it still says it is google).

This has a knock on effect in that i cannot access google-related websites eg gmail and any other website where i need to log in with my google account - a message comes up that there is a problem with the website's security certificate.

I have tried using various spyware/ virus detection but cannot figure out what the problem is. Has anyone else come across this problem before? I would be greatful for any help.