Fake AV has been around for a long time, and is nothing new, but it still gets a lot of people. Keep it simple. If you have an AV program installed, don't click anything that doesn't come from YOUR antivirus program. If you don't have antivirus installed, you know you shouldn't click on ANY of these notifications.
It should also be noted that if you're getting the popups, your system ALREADY HAS MALWARE ON IT. It probably isn't running with elevated privileges, until you click on it and give it said authority, but it IS already there. Spybot S&D is not bad. Ad Aware is not nearly as good as it used to be. Bazooka adware scanner is pretty good at finding them, but you will have to manually remove the malware.
The first step in keeping this activity down is to practice "safe browsing." Stop looking at internet porn sites. Don't go to "warez," download sites, software crack sites, etc. You can enhance your browsing security with the use of certain software like the "noscript," addon for Firefox...that's what I personally use.
I'm an IT security professional, so I take more drastic measures than most, but here's how I browse:
Ubuntu 10.04, fully patched.
within that, I run a Windows XP virtual machine, also fully patched, with a good "snapshot." I do all my surfing in the VM, using firefox with noscript. If I DO get some malware on the system, I can just restore from the snapshot. System Restore is NOT a good way to try to get rid of malware, for future reference, as many programs are written to infect system restore files.
Really, though...I could write a whole book on how to secure your system, and it'll only keep a "casual," intruder out. A professional will get in if they want in...so just be glad professionals probably aren't targeting your system.
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