Share your story! I've had it 3 times. A trojan virus. It happened twice when I was a kid, because kids are dumb and downloading everything they see and click on all links. My computer just shut down and a trojan virus message appeared. The third time happened this year. My gaming pc had no issues but I decided to do a full search and it found two different trojans. I had to reset my pc. I have no idea how I got a trojan since I don't download anything weird anymore.
But it has probably happened more than 3 times. My old computer is laggy af. I can't find any malware, but some are good at hiding. I'm convinced that this computer is affected even though I can't find it. But yeah, that computer is so laggy that I'm just going to throw it away. (Starting chrome literally takes 3 minutes)