I use Avast because of disasters with Norton. I was on Huffington Post and clicked on a silly article about bearded models. Right after I clicked on it, Avast responded that a virus was hitting my computer. It looks like the virus disabled Avast and set me up via a Microsoft-looking "Computer Security Center (unregistered)" to get help if I gave a credit card number. The virus has blocked access to my ability to scan and fix. Any suggestions?