I've had this problem on one computer and fixed it (but I can't recall just how I did it). The computer reports that there are security warnings. The windows security service is not running and will not start. In addition, the computer reports all downloads that allow fixes or remote access are viruses and are deleted.
There was a Google redirect but I solved that by doing a system restore back a couple of weeks.
I am not at that computer now, so from memory:
System--Win 7 Pro
Security--Norton internet security (360, I believe)