Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have Windows Vista Enterprise (x64) installed on my desktop. Is it possible to upgrade this to Windows 7 Professional? I know I could do a clean install, but I really don't want to.

I've read that if you change the EditionID and ProductName values in HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion, you can make the installer think you are upgrading from a correct edition version of Windows?

Will this work? Is there anyway I can upgrade; I'd rather not do a clean install.

share|improve this question
This article describes all of the supported upgrade paths: – BillP3rd Aug 27 '10 at 19:55
up vote 0 down vote accepted

Probably you can try forcing the Upgrade with the settings you've mentioned, but there's the risk of losing or damaging your entire OS setup (without the possibility of a roll-back).

There's a tool that Microsoft Provides for checking compatibility issues o your current OS installation. You should try it for having a clear idea of you situation.

Windows 7 Upgrade Advisor

share|improve this answer
I'll probably just clean install, that would be safer. – Rocket Hazmat Aug 31 '10 at 13:47

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.