Whether it is a product key or digital license, if you have purchased it from the official store or an authorized retailer, your key/license does not have an expiration date. Although it might come back in the future, for now, it can help you. If a bug or glitch is causing this Windows 10 not-activated issue, you may be able to fix it by restarting your computer. Irrespective of the device or operating system, this solution works like an incantation to get back your original setting or, in this case, activated Windows 10.

However, pirated Windows 10 users won’t get any help from this article and we recommend getting a genuine license instead of looking for cracked copies that could contain ransomware or malware. How to Fix Windows 10 Suddenly Not Activated IssueĪs this issue can occur due to different reasons, we recommend you to go through all the steps to get rid of Windows 10 suddenly not activated issue until you fix it. If you already activated your Windows 10 installation with an original product key/digital license, the following troubleshooting tips will help you get it back and remove that pesky watermark.

If you are getting an Activate Windows watermark all of a sudden on your screen, we will help you fix this. Although there is no official statement from Microsoft on how long you can use Windows 10 without activation, it is pretty annoying and unusual that your activated Windows 10 is suddenly having not activated issue.

Windows activation repair tool