Windows activation error 0xC004F213, "Windows reported that no product key was found on your device"
This code means Windows cannot match this device to a license and no product key is stored on the device to fall back on. It appears most after a significant hardware change, usually a motherboard replacement, because a Windows digital license is tied to the device hardware. Microsoft pairs this code with 0xC004F211, which reports that the hardware itself has changed.
The fix, in order
Run the Activation troubleshooter and choose the hardware option. Go to Settings > System > Activation and select Troubleshoot. When the troubleshooter reports that Windows cannot be activated, choose I changed hardware on this device recently and select Next.
Sign in with the linked Microsoft account. The digital license must have been linked to a Microsoft account before the hardware change. Sign in with that same account, then select this device from the list shown by the troubleshooter.
Enter the original product key if you have it. If you still have the 25-character key used on this device before the change, enter it at Settings > System > Activation > Change product key.
Check the edition matches your license. Look at Settings > System > About. A Home license will not activate a Pro install, and the reverse is also true. If the wrong edition is installed, reinstall the edition your license covers.
Ask the repairer or PC maker about a transfer. If Windows came preinstalled and the motherboard was replaced, contact the manufacturer or the shop that did the work. They may be able to transfer the original license, and Microsoft notes a new license may be needed if they cannot.
Buy a digital license if there is no key and no linked account. On the Activation page, select Go to Microsoft Store and follow the steps to buy a digital license for the installed edition. Before buying, run slmgr.vbs /ato in an admin Command Prompt to confirm activation still fails.
Do not buy a cheap key from a third-party key site, and never use an activator, loader, or crack. Keys from those sellers are often volume or misused keys that get blocked later, which leaves you back at this error with less money. Buy from the Microsoft Store or an authorized retailer instead.
If it still happens
If the troubleshooter hardware option, the original key, and the maker all fail to restore activation, contact Microsoft Support through the Get Help app or support.microsoft.com. Explain the hardware change, say which parts were replaced, and have your proof of purchase ready. Support can confirm whether the old license can be moved or a new license is needed.
Common questions
What is the difference between 0xC004F213 and 0x803F7001? 0xC004F213 specifically means no product key was found on the device after a hardware change. 0x803F7001 is the broader message that no valid license could be found. Both often need the troubleshooter hardware change path.
Does linking my Microsoft account really matter? Yes. The troubleshooter can only move a digital license to new hardware if the license was linked to your Microsoft account before the change. Without that link, Microsoft cannot tell the new hardware belongs to the same owner.
I replaced the motherboard under warranty, do I need a new license? Not always. If the maker replaced it, ask them about a license transfer first. If they cannot transfer it, Microsoft Support can advise on a replacement license, so check with support before buying one.