Here's a virus I got in my old computer:
Dubbed as ransomware. I got an infected email and opened a link to a website that was hacked, next thing I knew, my computer was completely locked with the above image on my screen. I couldn't do a thing. I had to remove the power cord and battery to shut down. Wouldn't even let me open in safe mode, but I was able to open a safe mode system restore tool. It took quite a while to figure that one out, but it worked. I performed quick scan with Malewarebytes and it found and deleted the Trojan Ransom virus. I'm running a full scan now.
I hope you don't get this one so I thought I'd give you a heads up folks!