As I read this I feel it is my duty to share....
I was on that site the other day and looking the classifieds....screen froze up, so I went to exit, a window come up with an issue, are you sure you want exit , I hit yes, and a scan popped up and I could't exit, then my computer said I had a severe threat......I have seen the same scan and threat message on another laptop last year and it is in fact some type of malicious issue.....right away I went to yahoo and when I clicked on a link F_CK BOOK popped up...it looked like facebook but was filled with adult content, no matter what clicked on it came back.....so beware...
You get your issue fixed? Just curious, because that is definitely the signs of a trojan infection - programs being downloaded and installed without your permission (i.e. bogus antivirus scanners). I recently removed one from a business server that had propagated to all of the user machines - what a major PITA that was...
Just as a sort of "putting it out there" sort of thing:
AVG Antivirus Free - I have been using it for years now and I have not had an issue with malware, or virus, or whatever you want to call it. It is not a resource hog like some of the other common antivirus software packages (ie Symantec and McAfee). And, when your subscription is up (which is never since it is free), it doesn't decide to make your computer inoperable and prevent you from uninstalling it.
In case anyone is lacking in the antivrus protection department, here is a link:
AVG Free - Antivirus Download | Free Virus Protection
Just follow the links for the free version. You have to be a little bit diligent to locate the correct link for the free version, but if you are on the internet, you should be able to manage it. It is also available on CNET, but if you use the AVG page as the portal, you are ensured of getting the most up to date version. If you install it, make sure you set it up to auto update
Also, there are several tools that can passively block bad websites. Of course, their effectiveness is dependent on running the program once in a while and updating the definitions file, as the free versions do not have auto update features most times. But, if it is between paying $50 and taking some responsibility for my own computer, I don't mind taking the responsibility...
SpywareBlaster -
SpywareBlaster | Prevent spyware and malware. Free download.
Spybot S&D -
The home of Spybot-S&D!
You have to scroll down to see the download link for Spybot. If you install it, make sure you choose to use internet protections (I think it is called TeaTimer???).
Spybot is a bit of a resource hog. It takes a bit to load on initial startup of the machine, and if you are still running anything less than 1GB of RAM, it will slow your machine down.
The combination of these three completely free programs has kept my machines virus free for years now. One thing to note, if you already have an antivirus installed, there is a good possibility that installing these programs on top of that will cause conflicts. Especially if you have McAfee.
Should you have an active infection, I have found that Malwarebytes is incredibly good at removing most things floating around out there. Maybe not everything, but certainly the most common offenders. Just use the free version.
Malwarebytes
Also, I have found Firefox far superior to Internet Explorer. Just my preference, but I like it better. Plus, it is very easy to block Flash...
Firefox Browser | Free ways to customize your Internet
https://addons.mozilla.org/en-US/firefox/addon/433/