Thanks for the reply. I had a look at my history and Project Nightcall is the game I saw earlier with the same reports. I had a look at their comments (sorry for stalking you, game dev) and it looks like the problem started about 4 days ago. I downloaded that too and found no issues. Like you said, seems to be a win11 issue, but in case it isn't hopefully this info will be useful for fixing it. It's very frustrating to upload a new game and your first comment is a virus report...