If you are testing an evaluation version of Windows 10 and decided to upgrade to the full version, you will face a stumbling block. The evaluation version offered is of the Enterprise edition but Microsoft does not support any way to convert the evaluation version to a fully licensed version of enterprise edition! You cannot change the edition with DISM commands or using any other method. Even if you download the ISO image of the enterprise edition of Windows 10 and try to upgrade the existing "evaluation" OS, it will not allow you to proceed.
Here is a workaround which lets you upgrade Windows 10 Evaluation to the Full version easily.
Tag: evaluation to enterprise
Upgrade Windows 8.1 Evaluation to Full version easily
If you are testing an evaluation version of Windows 8.1, you might be inconvenienced because Microsoft does not support any way to convert the evaluation edition to the full enterprise edition with a public KMS key like it is possible for Windows Server 2012. You cannot change the edition with DISM commands in Windows 8.1. Even if you download the ISO image of the enterprise edition of Windows 8.1 and try to upgrade the OS, it will not allow you to proceed.
Here is a workaround which lets you upgrade Windows 8.1 Evaluation to the Full version easily.