What's new

Solved Windows 10 activation problem (error 0xC004C003)


Hi all,

I've upgraded my SP3 to W10. After checking that my W10 was activated, I did a clean install of W10.
Everything worked for 24 hours and then, suddenly, Windows tells me that Windows 10 is not activated.

If I go to Settings/Windows Update/Activation, I click on "activate" and I've got an error ; error 0xC004C003.

Impossible to activate Windows 10..

I tried to restore. Same thing (windows 10 is activate and then, after a few hours, it isn't).

Anyone have the same problem ?



Microsoft must have heard it. Just start my Surface and it asks me to confirm my identity. when I did, I clicked on "windows Store" (in the "activation" section), and my Windows was activated ! (it's been 2 days that it wasn't)


I've talked too soon. After 24 hours of being activate, Windows is now unactivate. I click on "Activate" and same thing : error 0xC004C003. What the hell is happening ?


If you google the error code 0xC004C003 you will see a lot of results. Just see if any of them help you.


New Member
I had this problem and it appears to be that I'd upgraded my OEM Win 8.1 Pro using a free Media Center key. My in place upgrade to Win 10 went okay but a clean install failed with the above code.

Microsoft had no idea so I thought try to install the default SP3 Win 8.1 recovery image with just the BIOS key, upgrade to Win 10 and then do a clean install. It worked perfectly. So while it should only be your hardware id that gets saved for activating Win 10 during the upgrade process and the fact I'd used a different product key to the OEM BIOS one shouldn't matter, in my case it might have been the cause of not being able to activate a clean Win 10 install.
Search tags for this page
0xc004c003 win 10

0xc004c003 windows 10

0xc004c003 windows 10 activation
error code 0xc004c003 windows 10

windows 10 0xc004c003

windows 10 activation 0xc004c003
windows 10 activation error
windows 10 activation error 0xc004c003
windows 10 activation error code 0xc004c003
windows 10 error 0xc004c003