A simple answer is that you can use it forever, but in the long term, some of the features will be disabled. Gone are those days when Microsoft forced consumers to buy a license and kept rebooting the computer every two hours if they ran out of grace period for activation.

How long can you use Windows 10 without activation?

Thus, Windows 10 can run indefinitely without activation. So, users can utilize the unactivated platform for as long as they wish at the moment. Note, however, that Microsoft’s retail agreement only authorizes users to utilize Windows 10 with a valid product key.

Can you still use Windows 10 without activation?

It’s legal to install Windows 10 before you activate it, but you’ll not be able to personalize it or access some other features.