How to Upgrade from Windows 7 Beta to RC or RC to RTM Build?

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Whenever you try to upgrade from Windows 7 Beta to RC build or RC to final RTM build, you get following error message:

Actually Microsoft doesn't recommend upgrading from Windows 7 Beta to RC build and RC to RTM build. So its not possible unless you hack a file "cversion.ini" present in Windows 7 setup folder.

So if you want to upgrade existing Windows 7 Beta to RC or RC to RTM build, follow these simple steps:

1. Go to the folder containing Windows 7 RC or RTM ISO file and extract it using 7-Zip.

2. Now go to "Sources" folder and look for "cversion.ini" file.

3. Open the file in Notepad and you'll see following lines in the file:

Windows 7 RC:

Windows 7 Beta:

4. As you can see the MinClient value is set to 7233 in RC and 7077 in Beta build setup file but the public RC build number was 7100 and public beta build number was 7000. So just change 7233 to 7100 in RC build setup file and 7077 to 7000 in beta build setup file.

Windows 7 RC:

Windows 7 Beta:

5. That's it. Save the file and run the setup.exe file again. Now it'll allow you to upgrade from beta to RC or RC to final RTM build.

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This article was posted by VG in following section: Troubleshooting, Windows 7.

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VG

^^ Its RTM.
Zed

I'm having the same problem as TGW, where it gets to the WPEINIT window and then leaves me hanging. going to poke around and see if I can nudge it into continuing somehow.
spepper

thanks for the tutorial-- it worked! I had 2 systems both running Win 7 RC 7100-- I noticed initially, that I had inadvertently renamed the minclient=7100 and minserver=7100, when I tried that as an upgrade, I got a stop message that wouldn't allow it to proceed- I went back and renamed them as "...=7000" on each, and it worked perfectly-- so I'm guessing that any number you assign to each is fine, as long as it is a lower/older number than the version that is currently on the system--
Britto

hi VG, i have just activated my windows 7 enterprise 7600 free. Now i want to see ,is this is parmanant or temporary by windows script host. but i don't know how to see it by script host. please me.
VG

^^ If you activated legally, you can check it from System Properties. It'll show the correct status.
macpro

is the RTM iso still available for download?
VG

^^ Its not available. You'll need to purchase it.
macpro

damn it. o well. when does RC expire again?
VG

^^ March 1, 2010
KM

I just got my Win7 today and i currently have win7rc on my laptop. I plan to do a clean install do i have do this or will it just do a clean install, and or is there more that i need to do this?? Don't want to destroy my new Vaio. Thanks for the help