0xc004d302 Slui.exe 0x2a 0xc004d302 Microsoft Windows Core.
This problem were pop up when i want to change the product key. The full problem is 'error 0xc004e016 on a computer running microsoft windows non-core edition run slui.exe 0x2a 0xc004e016 to display. 
Slui.exe 0x2a 0xc004d302
I am trying to activate MS Server 2012 R2 Standard and I'm having issues. I have installed the software from the ISO file I downloaded from the volume licensing site. 
I have learned that this file installs a KMS client version of the software by default. I have both KMS and MAK keys for this software but since I'm only installing 2 instances of the software, MAK makes the most sense to me. I don't have a KMS host running on my network so I need to use MAK client. However, I cannot get my MAK keys to work when I run a powershell command such as slmgr.vbs -ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx. I always get the same result which is an error message 0xc004e016 - on a computer running ms windows non-core edition, run slui.exe to display the error text. Basically, its telling me that it doesn't like the license code. So, is there a separate ISO file for MAK client installations or is there a way to convert this KMS client to a MAK client.