itch.io

If that actually was the rotational speed of Earth, our days would last roughly 20 minutes. 40 000 / 24 is closer to 1 600 km/h. You'd still get yeeted hard and die though. 107 278.87 km/h is the speed at which Earth orbits the Sun, and when that suddenly halts, we're all suddenly astronauts lol.

Just for future reference: whenever something doesn't work or stops working while it was fine previously, always check your OS for updates.
Apart from that, I think software keys for Windows 10 go for as low as $15.00, not sure if that goes for the US though. I got mine for €12