Welcome to my technical blog. I confess I don't update this site
very frequently, but this is where you will find some technical commentary and creative solutions to
technical problems I have encountered. I hope you find the information
useful, if you do then please consider supporting the Spider's Parlor by
purchasing the Admin Script Pack, other Parlor tools or simply by making a
donation.Upgrading Windows 7 RC to RTM With Downgrade
When I installed the RC version of Windows 7 I tested out the Ultimate Edition. Now that the product has been fully released, I needed to upgrade to the final code. My company is licensed for Enterprise Edition though and the installation would not let you upgrade from RC to a down level edition. Furthermore MS doesn’t allow you to perform an upgrade even within the same edition.
Not wanting to reinstall all of my applications, I had to find a solution.
Upgrading from beta or RC code to the final code is an easy fix. Copy the DVD files to your hard drive. Open the Sources folder. Modify the CVERSION.INI file with notepad. The MinClient value needs to be equal to the version number you have already installed. So for me to upgrade from the RC I changed that file to the following:
[HostBuild]
MinClient=7100.0
MinServer=7100.0
OK, that will let you do an upgrade from an RC to the gold code, but the install will fail letting you know that you can’t upgrade from Ultimate to Enterprise. Luckily the fix is a simple one. Open up regedit. Navigate to the key HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion
Change the values of EditionID and ProductName to reflect the version you want to install.
So for me I changed EditionID from Ultimate to Enterprise and I changed ProductName from Windows 7 Ultimate to Windows 7 Enterprise.
After making those changes the installation proceeded without an issue.
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