I killed it with the power switch too since I couldn’t do anything else. Guess I got lucky - laptop finally powered back up ... yay!!
Ran every scan I had and nothing came up, so that’s good for starters! Haven’t been back on my browser yet .... may uninstall & then install it back. I need to do a little research first - my initial searches showed folks having trouble getting rid of that screen, kept coming back.
Glad your problem resolved & I think I’m on the way to getting mine cleaned up & going. Fortunately, I do run backups & had a recent one, so that wasn’t a concern if the laptop was truly dead.
Yeah, after your post I shut down my browser and ran all my scans again just to be on the safe side. Nothing other than the usual cookies and garbage. No malware noted. Hopefully just a random attack.