Microsoft has finally released a workaround for a bug created by the January 2021 non-security cumulative update preview and later.
The organization explains that both Windows 10 version 2004 and Windows 10 version 20H2 are influenced by the glitch, including an assistance document that devices in which the problem occurred could no longer run the Windows activation, as the process fails with error code 0xC004C003.
“Windows 10, version 2004 and 20H2 devices that have the January 2021 nonsecurity preview release, or perhaps a later version, installed might experience Windows activation failures containing error code 0xC004C003. Please be aware the January 2021 nonsecurity preview release, also referred to as the “C” release, was released February 2, 2021 and it is outside of the January security release, also referred to as the “B” release, which was released January 12, 2021. This problem is not present on devices that are running the January security release or perhaps an earlier release,” Microsoft explains.
So what is happening? When you try to activate the operating you get the next error:
“We can’t activate Windows about this device since you don’t possess a valid digital license or product key. If you feel you do have a legitimate license or key, select Troubleshoot below. Error code 0xc004c003.”
The workaround isn’t necessarily probably the most convenient but is pretty much the only method to bring things back to normal.
Because of the glitch has been reported within the January 2021 non-security preview release, Microsoft says you should install the January 12 updates or even the earlier cumulative updates. In other words, don’t install these new updates, and when you already did, just remove them.
The organization claims it’s already focusing on a full fix that would be shipped to Windows 10 devices, but an ETA isn’t yet available at time of writing.