Also, there’s a likelihood that the Microsoft servers that deal with activation are currently down. There are many websites that claim to offer genuine product keys for free or at a reduced price.īut, these are not reliable, and it’s recommended that you buy one from an official source. Other than that, some users also fell victim to counterfeit or incorrect keys. In this case, you must buy a new copy of Windows 10/11 or a product key. One of the most common reasons why Microsoft is not accepting your product key is when the one entered has already been used on the maximum allowed devices. Using product a key of a different version of WindowsĮlse, there may be other factors that may prevent you from activating Windows 10 Pro.The product key has been used on a maximum number of devices.There are several reasons you may not be able to activate Windows 10 or 11 Pro on your computer. Go through it and by the time you are done, the OS would be activated. We have dedicated this guide to simplifying the troubleshooting process and getting your copy of Windows 11 activated.

The trick here lies in identifying what’s causing the issue on your computer. There are a lot of reasons why you cannot activate your copy of Windows 11. This does not necessarily indicate that the key you have is no longer valid, as the error message suggests. It turns out that Windows 10 or 11 is not accepting the product key made of 25 characters.

But several users have reported Windows product key not working instances. The product key helps activate Windows and ensures that it’s a genuine copy, not registered on more devices than permitted. Is Windows activation or product key not working on your PC? If yes, we suggest you to go through this article.

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