My son had this Antivirus System Pro that hijacked his computer. It would pop up and say that he had a virus, then open one after another webpages (mostly porn-related!) I downloaded a tool to remove it called Malwarebytes Anti-malware and Advanced SystemCare Free from CNET's download.com. After running them, the problem was fixed and everything ran better than before with only one problem!!
Cannot get on internet!!! Have DSL - no prob with DSL coming in - will connect to internet on PS3. No problems with ethernet adapter/Network card - device is fine although I did uninstall and re-install (no upgrades available) just to be sure - In Network connections it says that he has a full connection. Tried resetting DSL modem - NOTHING! No internet, please help - son is driving me crazy!!