Every time I try to post to the Audio video forum(AVS) I get annoying page saying I have three virus and all the rest of the threats. I immediately close safari and open it and its gone but comes back periodically. I have free malware app and scan all the time and it says Im clean. If I choose to go to Firefox to visit the AVS forum no virus page ever shows up. I assume this thing is connected to safari and AVS forum but I just want to get rid of it. Any other free malware type apps that might find and get rid of this thing? I don't see anything in my Download area that looks suspicious. Thanks for help