Error Code 0xc004e016 Activation Error RRS feed

  • Question

  • Hello, I have been having this issue when trying to use Windows 10 pro from upgrading Windows 8.1 Pro. When i go to activate it, it doesnt work and gives the error 0xc004e016. Ive tried many solutions of deleting cache trying cmd in admin using slmgr to remove the old one which made thing worse now my windows will be invalid so Im not happy please help me. (I have my windows 8.1 key) thanks for your time
    Wednesday, July 29, 2015 3:19 PM


All replies

  • I've the same problem.

    After a number of problem with Windows 10, the tech-support take control of my PC tu upgrade and do a fresh install of Windows 10 from the iso file.

    Since the installation is done, my Windows Licence is invalid...

    Wednesday, July 29, 2015 3:48 PM
  • I got the same message when I tried to activate my Windows 10 which was upgraded from a Windows 8.1 pro. 
    Wednesday, July 29, 2015 3:54 PM
  • Same here , i have 3 Win8 / 8.1 serials and none work.
    Wednesday, July 29, 2015 4:13 PM
  • Same problem, Ive a legit windows 8.1 and decided to download the windows 10 iso myself. During the installation it wouldn't take my key so I decided to skip that part and activate later. Once in Windows 10 I tried to enter my serial for windows 8.1 but it gives me 0xc004e016.


    Wednesday, July 29, 2015 4:25 PM
  • I have 2 personal 8.1 serials and none works.

    This is a nice start for Microsoft. I am unhappy with 8.1, totally upset with windows 10 installation and I will go back to Windows 7 and I will check back for new Windows in couple years.

    Wednesday, July 29, 2015 4:31 PM
  • I have 2 Windows Pro 8.0 serial code purchase from upgrade Windows 7 and both is now not working or not allow me to register Windows 10. Very unhappy at this moment. Just like you guys, I'm installing Windows 10 using BootCamp for my Mac Book Pro (fresh installed) A solution will be helpfull
    Wednesday, July 29, 2015 4:35 PM
  • The same problem. I've got Windows 8 Pro key. Windows 8.1 Pro activates successfully with it. But after upgrading from Windows 8.1 Pro to Windows 10 Pro it loose my activation key and does not accept Windows 8 key. Same error: 0xc004e016.
    Wednesday, July 29, 2015 5:10 PM
  • If it helps, I too have the same problem. I have a legal Win8.0/1 pro code (an upgrade mind you) and tried a clean install from the downloaded ISO. Microsoft need to get this right. You either offer a free upgrade or not to the users. There is no way my parents/family would be able to deal with this issue. I have NO solution. Surely this must have been tested, surely...
    Wednesday, July 29, 2015 7:40 PM
  • I've just been speaking with a Microsoft Answer Tech and he said the solution is to reinstall your previous OS (Windows 8.1 Pro in my case) and to upgrade to Windows 10 using Windows Update, instead of through downloading the ISO - which is what I did.
    Wednesday, July 29, 2015 7:58 PM
  • I upgraded from Windows 8.1 Pro to Windows 10 using Windows Update but still got 0xc004e016.
    Wednesday, July 29, 2015 8:12 PM
  • I did an upgrade of a genuine win 8.1 pro to windows 10 pro, but it hung on 77% and rolled back to 8.1, so I wiped, did a full clean install of windows 10 pro and am getting this error on when trying to activate. It's absolutely disgraceful tbh.
    Wednesday, July 29, 2015 9:24 PM
  • I have Windows 8.1 Pro edition as well, but I did a complete new install on a new SSD and tried using my key. I'm having this issue as well.
    Thursday, July 30, 2015 4:46 AM
  • I get the same error code when trying to change key for activation: 0xc004e016. Upgrading from 8.1 Pro, where the key was working, using the media creation tool. The key was purchased from Microsoft for Win 8 Pro.
    Thursday, July 30, 2015 6:40 AM
  • I don't know what Microsoft has done, but after day of 0xc004e016 problems and waiting for a solution, I klicked on the "activate" button just to see what happened, and lo and behold, Windows 10 was activated.
    Thursday, July 30, 2015 7:03 AM
  • Yes, activation I ok for me too. Just wait for one day.
    Thursday, July 30, 2015 5:15 PM
  • We are experiencing an issue with our activation service that can result in some PCs failing to activate after the upgrade.

    See Vinod Archak's post for more info:


    Thursday, July 30, 2015 7:31 PM
  • Jeff, so can I do clean install Win 10 Pro if I've activated my copy of Win 10 Pro with case of upgrading from Win 8.1 Pro? Just want clean answer. Don't have enough time for manipulating with OS's such as free space on my SSD. You know - Windows.Old is heavy enough.

    Friday, July 31, 2015 10:36 PM
  • Andrew,

    If your Windows 10 activation status is "Windows is activated," then you can perform a clean install.

    See Vinod's post for more info:




    Saturday, August 1, 2015 10:19 PM
  • Hi Leroxz,

    Thank you for your question.

    By my understanding, you use Window 10 from Window 8.1. if Window 8.1 has been activated before we update it to Window 10, we could not activated it. Because Window 10 will be activated automatically,  we could not be worry about it.

    If there are any questions regarding this issue, please be free to let me know.

    Best Regard,


    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.

    Jim Xu
    TechNet Community Support

    Tuesday, August 4, 2015 1:37 AM
  • Hi all,

    Other users have occurred the similar issue: After upgrade from Windows 8.1, Windows 10 is failed to be activated with Windows 8 or 8.1 key, and the error is 0xC004E016.

    And the workaround could be "Revert back to Windows 8.1, make sure the machine was activated then upgrade again."

    For more information, please refer to the similar thread:




    Thursday, August 6, 2015 3:13 AM
  • I'm having same issue. Was on 8.1 and last month I took the free upgrade to 10. Everything went fine. Then on the 29th when the free upgrade ended my Windows 10 now says its not activated. Tried using my Windows 8.1 key and getting same error code 0xc004e016. Spoke to 7-8 microsoft techs w/o any results yet. They keep passing me to another tech. Many times I'm disconnected and have to start over again in the queue. One tech said I had to contact the purchaser of my PC. Duh-pc purchased from Apple and Windows 8.1 purchased from Microsoft Store. Last night I was working with a level 2 tech, he put me on hold and then he was gone. Called back and they were closed for the day. Now does that beat all, hang up with a client because it's time to go home.
    Sunday, July 31, 2016 4:02 PM