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
- Go to, Start, Run: and type: regedit.exe
- Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
- Change the key: ProductName from "Windows 7 Enterprise” to “Windows 7 Business” or to “Windows 7 Ultimate”
- Change the key: EditionID from "Enterprise" to “Business” or to “Ultimate”
- Do not restart!
- 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.
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