A. Once you have a VHD mounted as a drive letter, you can check the editions you can upgrade it to using the /Get-TargetEditions switch of DISM. (See this FAQ for help mounting a VHD.) The VHD I'm checking is running Windows 7 Home Premium. As you can see, it shows I can update it to Ultimate or Professional.
D:\Documents\Scripts>dism /image:w:\ /get-targeteditions
Deployment Image Servicing and Management tool
Image Version: 6.1.7600.16385
Editions that can be upgraded to:
Target Edition : Ultimate
Target Edition : Professional
The operation completed successfully.
The order of operating systems for the purpose of upgrading to a higher version is:
- Windows 7 Starter
- Windows 7 Home Basic
- Windows 7 Home Premium
- Windows 7 Professional
- Windows 7 Ultimate