I have changed my hardware on my PC and now I cannot get my Windows Activated

Question

Error Code 0xC004C003

Used Trouble Shooter - Then tells me servers are not available right now

Answer 1

Hi
Please try running the troubleshooter again and check if your internet is valid.
You could follow these steps:

1. Sign in as an administrator.
2. Select the Start button, then select Settings > Update & Security > Activation > Troubleshoot. The troubleshooter will show Windows can’t be activated on your device.
3. Select I changed hardware on this device recently, then select Next.
4. Enter your connected Microsoft account and password, then select Sign in. The troubleshooter will only work with the connected Microsoft account.
5. From the list of devices that are linked to your Microsoft account, select the check box next to This is the device I’m using right now.
6. Select Activate.

If you need additional help reactivating Windows on your device, contact customer support.

Answer 2

Some details here about 0xC004C003
https://support.microsoft.com/en-us/help/10738/windows-10-get-help-with-activation-errors

--please don't forget to Accept as answer if the reply is helpful--

Answer 3

Hello,

Here is what Microsoft recommends for error code 0xC004C003:

You may see this error because the Windows 10 product key you entered isn’t valid. Product keys are unique—assigned to a specific user to install on a single device. If a key was used (or attempted to be used) on multiple devices, it’s marked as not valid. To activate Windows, you’ll need to provide a different Windows key unique to your device.
If you bought a device from a reseller of Windows 10 and expected the key to be valid, contact the reseller. If your device was purchased with Windows 10 preinstalled and you received this activation error upon turning it on for the first time, contact your device manufacturer.

Hope this helps!