Windows 10 Help! We can't activate windows on this device.

  • Thread starter Thread starter Crozwind14
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Crozwind14

I bought a new SSD and install win 10 pro. I cant use my product key (error code: 0xC004C008). "we can't activate windows on this device because the product key was already used". I already remove my product key from my previous SSD by using slmgr /upk command and slmgr /cpky command. Hoping to get help. Thanks!

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