That sounds really bad, you should make a topic about your computer issue in the correct section so more people can see it and help you out. I don't think anyone will notice it in the FFX help section. Did you have an anitvirus prior to downloading whatever it is you downloaded? whatever it is was, was probably a fake antivirus. Don't download anything you don't trust. If you need an antivirus download Avast free version or AGV free, and scan your computer.
