Hallo,you may have been infected by TDDS.
Please download aswMBR from here http://public.avast.com/~gmerek/aswMBR.htm
1)Double click the aswMBR.exe to run it
2)Click the [Scan] button to start scan
3)On completion of the scan click [Save log], save it to your desktop and post in your next reply

Make sure to post your log in your next reply.

If this doesn’t help,i will pm Essexbot,to help you.
Looks like he will be super busy today with all that google redirects,haha ;D.