Written by When you try to add the the KMS key for Windows Server 2012 R2 or Windows 8.1: cscript %windir%\system32\slmgr.vbs /ipk [product key] you receive the following error: 0xC004F050 The Software Licensing Service reported that the product key is invalid The KMS server needs to be updated before the key is recognized. Follow this link, download […]
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