actually, maybe it's not completely done maliciously but from mistake, a few updates ago, I noticed after updating my windows 11 to latest windows build, I start getting false positive from download that can persist for hours, before the issue suddenly gone away and I can download the same file without any alarm from my windows defender. Basically, the problem is windows update being shitty as usual. But some people just jumped the gun and think the file are infected with a virus, rather than confirming whether it is false positive or not by seeking confirmation from others.