📎 AI Summary:
The thread discusses a Windows 10 activation issue experienced after reinstalling the OS, where the user encounters error 0xC004C003 despite using a valid product key and keeping the hardware unchanged. The original poster is concerned about losing activation and the potential impact on their system. A responder suggests using command prompts (slui 3 and slui 4) to activate Windows, offering troubleshooting options to resolve the activation problem.
Ralph Bromley

Ralph Bromley

Fantastic Member
Joined
Jun 1, 2012
Messages
577
Thread Author #1
Okay so today I was having some major issues with windows 10, apps were taking forever to load and i did a defrag and after some more issues i decided to reinstall windows.

But for some reason i keep on getting a error 0xC004C003.

So windows 10 as of now is unactivated, I had a valid key and I thought with UEFI this was not supposed to happen and that my key was linked to my hardware.

And its not like I changed my hardware, its the same hardware as before!

And I was able to do a fresh install before what the hell???

I hope this doesnt mean my windows 10 is toast or heads will bloody roll
 

Solution
Neemobeer
Try opening a command prompt and type slui 3 and enter your key that way. If that doesn't work you may need to call, you can try the self activation hotline. Type slui 4 and follow the prompts.
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Neemobeer

Neemobeer

Windows Forum Team
Staff member
Joined
Jul 4, 2015
Messages
8,995
#2
Try opening a command prompt and type slui 3 and enter your key that way. If that doesn't work you may need to call, you can try the self activation hotline. Type slui 4 and follow the prompts.
 

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