Windows Suddenly Deactivated Itself

[Ryan Wanner]

Hello; as of roughly two days ago, my system has been displaying the "Activate Windows" watermark out of the blue. I have been using this PC, and the version of Windows I bought for it for over a year without issue until now. I did not change any hardware, and when I troubleshoot activation it says "we weren't able to activate Windows on this device." The Activation State says "not active" and "Windows reported that no product key was found on your device. Error code: 0xC004F213." I doubt I still have my copy of Windows lying around, but I could look for it.

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