Security Toolbar 7.1 was put on my computer about a week ago. At first it gave messages saying that we had viruses and the like. I would just close the messages, and keep doing whatever it was i was doing. Then the messages started coming in groups of ten and really bogging my computer down. I purchased XoftspySE and ran it several times but nothing happened. Now all i can get to is my log on screen, I'm writing this from my Mac. I don't know what to do, i can't get on the computer to try to download anti virus software. Help please.