Upgrading Enterprise Edition to Ultimate (Vista or Win7)

If you are ever in a situation where you want to upgrade say from Vista Enterprise edition to Win 7 Ultimate edition – by default you cannot do this. When you insert your Win7 disc you won’t find the upgrade option available and the only way you see forward is to do a complete fresh install (after backing up your data of course). However, that is very time consuming and of course generally a lot of pain.

So here is a tip to get you to upgrade without doing a complete fresh install where you “fool” the installer in thinking you have a different version to allow you to upgrade.

You need to do the following steps, before inserting the Windows DVD

  1. Go to, Start, Run: and type: regedit.exe
  2. Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
  3. Change the key: ProductName from "Windows 7  Enterprise” to “Windows 7 Business” or to “Windows 7 Ultimate”
  4. Change the key: EditionID from "Enterprise" to “Business” or to “Ultimate”
  5. Do not restart!
  6. Now insert Windows DVD and start upgrading (the option Upgrade will not be graded out anymore)

Of course you will need the appropriate licences and still need to activate, etc.

Published by

Amit Bahree

This blog is my personal blog and while it does reflect my experiences in my professional life, this is just my thoughts. Most of the entries are technical though sometimes they can vary from the wacky to even political – however that is quite rare. Quite often, I have been asked what’s up with the “gibberish” and the funny title of the blog? Some people even going the extra step to say that, this is a virus that infected their system (ahem) well. [:D] It actually is quite simple, and if you have still not figured out then check out this link – whats in a name?

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