Windows 10 Activation – How to Verify



How to make sure / check your Windows 10 is activated permanently and how to activate and resolve common Product key issues in Windows 10 after free upgrade (Windows 7 SP1 or Windows 8.1) or clean install from ISO.

Fix Windows 10 Activation error – See the Microsoft help page link below.
Windows 10 isn’t activated after upgrading for free from Windows 7 SP1 or Windows 8.1 Update
Genuine Validation detected tampered Windows binaries. (Error code: 0xC004C4AE)
The Software Licensing Service determined that this specified product key can only be used for upgrading, not for clean installations. (Error code: 0xC004F061)
A networking problem has occurred while activating your copy of Windows. (Error code: 0xC004FC03)
The activation server reported that the product key has exceeded its unlock limit. (Error code: 0xC004C008)
This product key didn’t work. (Error code: 0xC004C003)
The activation server reported that the Multiple Activation Key has exceeded its limit. (Error code: 0xC004C020)
Unspecified error. (Error code: 0x80004005)

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