Help me please!!! Today I started up my computer and I got I message in a little gray box saying, "I think something's wrong. Don't you think so?" I clicked no, and it disappeared. I restarted my computer, got the same message, but clicked yes this time. It said, "Ha, you're smarter than I thought." I am absolutely certain it's some virus, and if someone could please tell me what's going on, and what to do, it will be HUGELY appreciated!!!!