If you need help, Lee Grant’s excellent article on this very subject is available here. Windows 10 can be downloaded directly from Microsoft’s website and installed onto a CD or USB stick. In fact, apart from a few cosmetic restrictions and some subtle nagging, it seems you can have a fully working version of Windows 10 for as long as you wish. As this grace period shrank, Windows would also harass you about activating to the point of distraction.įortunately, Microsoft seems to be more laid back when it comes to Windows 10, as there’s no time limit in place. After that time, it would stop working and you had to buy a product key to continue using it. With previous versions of Windows, you had a limit of around thirty days to do this. If you use an unactivated version of Windows 10, you may have noticed some notices suggesting you “activate” the system.