Possibly because windows offers sandbox capabilities as well, and breaking out of that would be classified as a jailbreak. Even if someone at Microsoft got ove

Possibly because windows offers sandbox capabilities as well, and breaking out of that would be classified as a jailbreak. Even if someone at Microsoft got overzealous (or a third party reported it), the software is literally designed to find and quarantine exploits (which a jailbreak is), and there are ways to bypass it even if it wasn't apparently reversed later. The item detected is an exploit, just for a different system. It's exactly the sort of false positive I would expect, and the fact that you can work around it without major issues (whether through a special download folder you create and mark as not scanned immediately or temporarily disabling it) is exactly what I would expect. It's sort of like if you owned a furniture store, and have a security guard to watch it. One night after hours, some guys in street clothes show up in a truck and loiter for a bit before going in the back and starting to take some furniture to the truck. Sure, these guys are your cousins, and are doing stuff on your behalf, but does the guard know that? Did you tell the guard? Would you rather the security guard go stop everything immediately and call you to confirm what's going on, or just shrug and say "eh, it's probably fine"? You're paying them to stop bad stuff, you should expect them to stop bad stuff, and when they find false positives that look like the real thing, that should be reassuring that they're doing their job, not grounds for dismissal.