Convert MSDN Windows 7 Enterprise installation to Ultimate

Convert MSDN Windows 7 Enterprise installation to Ultimate Unthinkingly I installed Windows 7 Enterprise on my development box at work rather than the Ultimate version. Now windows is complaining that it is unable to activate because it can't contact a KMS (Key Management Service) which my company doesn't have.
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Guest [Entry]

You should be able to get an activation key from MSDN for the Enterprise edition that works fine to activate your installation over the Internet without changing editions. I used a partner activation key with Win7 Enterprise and it worked fine. It should be the same for MSDN. In fact, I can generate a key in the MSDN subscriber downloads website also.

Guest [Entry]

"I'm not aware of an official one.

You might try this:

http://www.msfndotorg/board/upgrade-windows-vista-enterprise-ultimate-t96799.html

There is a way to upgrade Windows Vista Enterprise to Ultimate (not enabled by default)

Before inserting the Windows Vista Ultimate CD

Go to, Start, Run: and type: regedit.exe

Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion

Change the key : ProductName from ""Windows Vista ™ Enterprise” to “Windows Vista ™
Business”

Change the key: EditionID from ""Enterprise"" to “Business”

It's instructions for Vista, but it might work for 7 as well.

It also only takes around 30 minutes for a full reinstall anyway :)."