I was trying to install some software when windows defender started acting up. I ignored it and continued to install the software, it was supposed to be a bin extraction program I think.
I noticed my computer suddenly got very slow and a browser popped up that said "...ThankYou..." in the web address, before my computer began to restart. I pushed and held the power button before the computer could shut off normally.
When I turned my computer back on again, I logged in normally with my Microsoft account (I have Windows 10), but when I logged in again, I was greeted by this screen in the photos I have provided. My screen was completely black except for two windows, one asking for my password, and the other telling me to call customer support, I could not interact with this window. Both seemed suspicious so I took pictures and turned of my computer.