We documented it in early November with a specific HTML5 API ( history.pushState) which caused the browser to freeze. Recently, there has been a trend for scammers to cause denial-of-service attacks against people’s computers. These fall into the ‘browlock’ category if they are via the browser and into the screen lockers category if they are actual malware that runs on the system.
Tech support scammers have been using various themes to push fake alerts to scare users into calling for assistance.
