Windows 8 KMS Activation Error: Event ID 1017 0xC004F050

When configuring a Horizon View environment for Windows 8 activation, I was receiving Event ID 1017 Installation of the Proof of Purchase failed. 0xC004F050


The KMS Server is a Windows 2008 R2 VM which has HotFix KB2757817 installed to allow activation of Windows Server 2012 or Windows 8 on a Server 2008 R2 VM.

When trying to add the Windows 8 KMS key using

slmgr.vbs /ipk <Windows8KMSKey>

Resulted in the error ‘On a computer running Microsoft Windows non-core edition, run ‘slui.exe 0x2a 0xC004F015 to display the error text.

Error: 0xC004F015


This then meant that my Windows 8 VM’s where stuck in the ‘customizing’ state in Horizon View Administrator.


The fix is simple you need to use a Windows Server 2012 KMS license rather than a Windows 8 KMS license.

slmgr.vbs /ipk <Windows2012KMSKey>

Which returns ‘Installed product key XXXXX-XXXXX-XXXXX-XXXXX successfully’


Then last of all run the command

slmrg.vbs /ato

Which will activate the KMS license.

3 thoughts on “Windows 8 KMS Activation Error: Event ID 1017 0xC004F050

  1. Hi! I have successfully installed the product key. I was prompted –> (‘Installed product key XXXXX-XXXXX-XXXXX-XXXXX successfully’). But when I try to do (slmrg.vbs /ato), I still get the error 0xC004F074 “The Software Licensing Service reported..etc…” Help please. 😦

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