Hi, I'm running the latest version of Firefox on Windows 10 desktop. I have several windows open at a time with several tabs open in each window. All of a sudden this ransomware hits and locks up an entire window and all its tab plus all keys on that page. The other tabs in the other windows operate fine but I have to turn the volume down because the ransomware keeps repeating over and over to call this phone number 888-728-6247. The popup on the screen talks about all the normal stuff - asking for money, getting into Facebook, the pc being locked up, etc.
This has been going on for a month or so and I was able to get rid of it by shutting the pc down and re-starting it. But, that no longer works. I had AVG free virus protection but that didn't catch it. I put on Ransom Helper (I think it's called) and that didn't work. So, I then deleted AVG and put on the free version of Avast and ran a scan but that didn't pick up anything relating to this.
The background screen of this indicates it's Microsoft initiating this but obviously it's not.
I Googled this name but there is nothing there. Not sure what to do next.