Windows 10: Activation fails Error code: 0xC004C003

i saw a reddit thread discussing the same issue. Some said Resetting windows will help while some say that their servers are overloaded and can take some time to activate your Copy.

 

Thanks , i hope thats the case.

 

fredc - If you still have that blocked Win7 product key in there, you MAY be better off stripping it out while you wait for activation. I don't have time to look it up but I'm willing to bet that user NavyLCDR can give you the command line slmgr options that would strip that blocked key out.

 

Thanks , i tried some commands already to no avail. I restarted the computer and still no luck.

 

How about: slmgr /upk from an elevated command prompt?

 

Just tried it :

 

Sorry, my bad typo, should have read: slmgr /upk

Corrected type in prior post.

 

Don't know what the error code means but here it is:

 

OK, well it's out of my depth at this point. Short of redoing the clean install and never attempting any product key during or after the install, I would look to more expert members here to give guidance. Sorry I couldn't help more at the moment.

 

I have the exact same error. In place upgrade from a factory Windows 8 x64, then a clean install of window 10 home x64. Refused to activate, has been 3 days now. I noticed in my Microsoft account it's showing devices Windows 10 core twice for the same laptop

 

You can't legally upgrade Windows 8 x64. You do need to have Windows 8.1 x64 installed before you do the upgrade.

Windows 10 can only upgrade Windows 7 sp1, and Windows 8.1.

Well, that's what Microsoft mentions everywhere. Are you sure your upgrade was activated?

 

Yes I left out some details Windows 8.1 fully updated and activated, in place upgrade and successful activation to window 10, media creation Windows 10 DVD, clean install, now toshiba satellite won't activate the clean install. Tried every suggestion I've seen, thanks.

 

Okay, I just wanted to be sure of it.

I'm currently typing this on a Toshiba Satellite (an old L40), and everything went fine for me. Although, I did have a little problem activating because the servers were so busy. However, I managed to do it by typing "slmgr /ato" at the command prompt, I had to do it 5 times before it activated my Windows copy.

Although, I have to say, I also didn't use the normal upgrade procedure on my systems. The moment Windows 10 came out, I downloaded the ISO files and then created an USB stick with it. With this stick, I did the upgrade by running setup.exe, and when it was done, and my laptop crashed, which I was afraid of it would, I did a clean install. And from then on, it has been running very nicely. No BSODs anymore, which I had during the past few months with Windows 8.1.

BTW, I didn't do a clean install on all my systems, or those of my friends. But on those where I did it, I did it always like mentioned above, and it worked like a charm.

All of them managed to get activated.

 

That is not true at all. Once again....Windows 8.1 or Windows 7 SP 1 is required ONLY for upgrading via the Windows Update method. Non-SP1 Windows 7 and Windows 8.0 can be upgraded using the Media Creation Tool, "Upgrade this PC now" option (and also from the ISO).

 

Thank you so much for your help Sir, really appreciate it . Still not having any luck and I see another member is dealing with the same thing so at least I know the problem is legit , we could both be crazy but I like to think the former is true.