Pop-up from Defensescan.org Can't be Closed? - How to Fix Your Browser with Annoying Fake Virus Alert?

What is defensescan.org

Defensescan.org domain page comes on different browsers like Google, IE and Firefox. It seems a horrible virus alert because users fail to close it. And the domain name "Defensescan" makes it looks like a standard report.

Even though, you should never believe what it says. This is a fake message, an ad offered by the adware on your browser. It aims to lead users to call the provided number 18447988878. Victims who do as it says will be asked to pay for the so-called tech support or tools sooner or later.

Your browser may get infected with the adware by visiting malicious sites, or it can be hidden in freeware installations and installed by users mistakenly.

When you see such a pop-up, you should use a scanner to check the real security condition of your PC, and try to remove the adware in time to stop the related adware.