You might encounter Windows 10 activation issues after upgrading from Windows 7/8 to Windows 10 or after reinstalling Windows 10 or after making significant changes to your PC’s hardware. In the past, we discussed how to check if your Windows 10 copy is activated and how to know why your Windows 10 is not activated. In this guide, we will see how to use the official troubleshooter to fix Windows 10 activation issues or errors. Windows 10 activation troubleshooter In recent builds, there is a built-in troubleshooter to diagnose and repair Windows 10 activation issues. The troubleshooter can be used when you’re unable to activate Windows 10 using the product key that you have or when Windows 10 is deactivated after installing a major update or after upgrading from previous versions of Windows. The Windows 10 activation troubleshooter tries to detect the reason behind activation error and tries to activate your copy of Windows 10. However, if the last entered Windows 10 product key is not valid, or if there are major issues, the troubleshooter suggests the action that can be taken to activate Windows 10. The activation troubleshooter will definitely help the Windows 10 support team at Microsoft as the troubleshooter might fix the activation issues for a large number of users who’re having activation issues after upgrading to Windows 10 or reinstalling Windows 10. We recommend you run the troubleshooter if your Windows 10 was activated before this or if your previous version of Windows was activated or if you’re having an activation issue after reinstalling Windows 10. Using Windows 10 activation troubleshooter to fix activation problems Follow the given below directions to access the Windows 10 activation troubleshooter and run the same. Step 1: Open the Settings app by clicking its icon in the Start menu or using the Windows logo, and I keyboard shortcuts. Step 2: Once the Settings app is launched, click the Update & security icon. Step 3: Click Activation. Under Activate Windows now section, click the Troubleshoot link to run the activation troubleshooter. Step 4: The troubleshooter will try to detect problems that are stopping your Windows 10 from activating and then attempt to activate. If troubleshooter can’t activate Windows 10, it will show the best way out there to activate your copy of Windows 10. Finally, if the activation issue persists even after running the troubleshooter, we recommend you contact the Microsoft support team using the built-in Contact Support app. You can either have a chat with the support team or request a callback. Let us know what you think about Windows 10 activation troubleshooter by leaving a comment below. Our how-to turn on or off automatic activation in Windows 10 guide might also be of interest to you.