We recently got sent a server with a Windows 2012 license and a Windows 2012 R2 media kit. Obviously we had to load the non-R2 version of Windows which presented us with a problem. We solved this by:-
- Downloading the evaluation ISO from Microsoft, here: https://www.microsoft.com/en-gb/evalcenter/evaluate-windows-server-2012 (there are numerous versions of windows here including Windows 2012 and 2016.
Once installed, run the following command from an elevated prompt:
- Standard edition: DISM /online /Set-Edition:ServerStandard /ProductKey:YOUR-PRODUCT-KEY-HERE /AcceptEula
- Datacenter edition: DISM /online /Set-Edition:ServerDatacenter /ProductKey:YOUR-PRODUCT-KEY-HERE /AcceptEula
- Confirm restarts when prompted