Sounds like you have a variant of the Rogue "Fake Alert" malware.
It is very vicious, and is very difficult to get rid of as it is similar to a VX2 morphing virus.
It indicates you have trouble with your PC and starts a scan which Looks like your "My Computer" drive list....which is totally bogus, and then finds "phony - for the time being" viruses and then asks you to pay for it to remove the viruses. It's all fake, except for when you put your credit card number in.
It continues to pop up here and there, but in the background it re-routes connectivity to your PC, steals logged I.E. files such as text typed, passwords, credit card numbers etc etc and slowly launches more and more viruses until your PC is basically un-usable.
Some of the variants are worse - like one of my clients just had. The second the malware is detected by an antivirus or anti-malware program, it re-names itself and re-installs on the Hard drive ready for the next boot.
Most of these are coming in from Java exploits, but are also on links that are re-directed URL's that appear OK.
That's what bothers me the most about the Adult Video portion of the forum. I try to flag them when I catch bad links, but it's impossible to catch all, and...each page has different advertising ads that cycle, so one day the site might be OK, the next ...BAM.
First things first. Shut off system restore.
Download Malwarebytes.org and see if you can pull it out. If you can't, depending on the variant of that Rogue, you may need to dive deeper in.
What Antivirus are you using? If none, download Avast Antivirus. AVG Free is weak and cannot pull viruses like Avast can during a "Boot time scan". Important note...if you have Norton or McAfee, you may need to disable these first, as the programs will conflict.
Whatever you do, don't leave it run free - it will only imbed itself worse into the operating system and start multiplying itself.
If you need help, I can remote in and check it out if you like.
