A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
It seems to come from some unity versions, not windows, even if you should check the DEP settings if it doesn't work still. In order to make sure...
I've been experiencing this bug for a couple weeks and I've tried a lot to solve this problem. I'm quite sure the problem doesn't comes from Unity...