Unable to activate Windows 10 (0xc0ea000a)
Most of the time you’ll encounter this Windows 10 activation error if you have changed your PC hardware such as upgraded to a new CPU or Motherboard – after the initial activation of the device. But this error can be triggered also on reboot after a system crash. However, it is widely known that this Windows 10 activation error usually rectifies itself after a couple of hours. The explanation to this lapse is that sometimes Microsoft activation servers can be inundated with activation requests – hence the server is overloaded – which is why it says to try again later; as shown above on the error prompt. So, if 24-48 hours have elapsed after the activation problem appeared, and your device is still not activated, you can proceed with the instructions below to manually reactivate Windows 10 after a hardware change.
Reactivate Windows 10 after a hardware change
When you’re ready to reactivate, make sure that your device is connected to the internet and then follow the steps for either a digital license or product key. If you don’t have a product key or digital license, you can purchase a Windows 10 digital license after installation finishes. Here’s how to make a purchase: Launch the Settings app. Click Update & Security > Activation > Go to Store to open the Microsoft Store where you can purchase a Windows 10 digital license.
If you have a digital license, run the Activation troubleshooter.If you don’t have a digital license, enter your product key as shown below:
If Windows 10 wasn’t pre-installed on your device when purchased and you used a product key to upgrade to Windows 10, then you’ll need that same product key after the hardware change. To enter your product key, launch the Settings app. Click Update & Security > Activation > Change Product Key. Then enter the product key. If you installed a retail copy of Windows 10 on your device using a Windows 10 product key and then made hardware changes, follow this same process using your Windows 10 product key. If this instruction to manually reactivate your Windows 10 device fails to resolve the issue and also the wait time of 24-48 hours has elapsed and your device is still not reactivated, you can contact Microsoft Support. Hope this helps!
