Windows 10 Product Key Activation Issue

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Things you should know:

• A Windows 7 or Windows 8/8.1 product key cannot activate Windows 10. Windows 10 uses its own unique product key. 
  
• By default, Windows 10 builds are pre-keyed, meaning, you do not have to enter a product key and should not be prompted to enter one as long as you upgraded from an activated Windows 7 or Windows 8 or Windows 8.1 license or Windows 10 Preview build.
   
• If you perform a clean install on first attempt, you will have to start over from an activated Windows 7 or Windows 8/8.1 installation.
  
• If you are prompted to enter a product key, click Do this later and give it a few days, Windows 10 will activate automatically. 
  
• Activation servers are being overwhelmed at the moment because of the volume of upgrades, so give it some time if you get an error message such as (0XC004E003, ,0x8007000D, 0x8007232b or 0x8007007B) Windows 10 will eventually activate as long as you upgrade using the appropriate method. 
  
• There is no need to know your Windows 10 product key, read the following 'Understanding Product Activation in Windows 10:
  

Can I perform a clean install using the Free upgrade?

No, it will require that you are running a previous qualifying version and start the upgrade from within the qualifying version. You can initiate a clean install after completing the Upgrade.


Please be aware that you cannot use the free upgrade offer to perform a clean install on first attempt. You must first upgrade from the qualifying version of Windows 7 or Windows 8/8.1 (whether you do it through Windows Update or using the .ISO file). Ensure the upgrade is completed successfully and then ensure that it is activated. You can then proceed to do a clean install by using recovery media or using the Reset function in Start > Settings > Update & Security > Recovery > Reset this PC (Get Started).


More information on this subject can be found here:

How to Activate and resolve common Product key issues in Windows 10

Why can't I activate Windows 10?

Cannot activate Windows 10. Product Key blocked.

Activate Windows 10




Generic Key TX9XD-98N7V-6WMQ6-BX7FG-H8Q99 and VK7JG-NPHTM-C97JM-9MPGT-3V66T for Windows 10 Home and Pro editions