WIndows activation error 0x803fa071

Failure 0x803fa071 during OS activation is possible, even if you bought a product license key from a specialized store.

This happens if your 25-digit code is marked as already applied on another PC.

In this case, there are several options.:

• Deactivate the product key on another device; Delete the Windows activation key
• Try to fix the error by clicking on “Troubleshooting”;
• Purchase another activation code;
• Contact the seller for help in solving the problem.

The latter option is relevant if you are using a licensed version of the OS and are sure that you have never used this product key before.

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