Fix Windows 10 Activation Failed Error Code 0x803F7001

Fix Windows 10 Activation Failed Error Code 0x803F7001
I show you a quick workaround for this annoying error.
1. Click Start / Settings / Update & security / Activation / Change the product key then enter the new product key then click Next to Activate
Warning: please make sure you use the right product key for your windows edition or it won't work.
2. Enter the Windows 10 Default Product Key.
You can get a lot more details from the link below.
How to troubleshoot Product Activation in Windows 10
goo.gl/zbjpKY
3. It will probably fail to activate but don't worry.
4. Click Start / Settings / Update & security / Activation / Change the product key then enter the new product key then click Next to Activate
5. Enter the Windows 7, Windows 8 or Windows 10 Product Key
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