
As we all know Microsoft has released Windows 7 RC build to Connect, TechNet and MSDN subscribers and public release is set to 5th May.
Now if you have downloaded the RC build and you are trying to upgrade existing Windows 7 Beta build to RC, you'll get following error message:

Actually Microsoft doesn't recommend upgrading from Windows 7 Beta builds to RC build. So its not possible unless you hack a file "cversion.ini" present in Windows 7 RC setup folder.
So if you want to upgrade existing Windows 7 Beta build to RC build, follow these simple steps:
1. Download the Windows 7 RC 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:

4. As you can see the MinClient value is set to 7077 but the public Beta build number was 7000. So just change 7077 to 7000.

5. That's it. Save the file and run the setup.exe file again. Now it'll allow you to upgrade from Beta build to RC build.
Complete list of AskVG articlesThis article was posted in Troubleshooting, Windows 7.
Related Articles
Popular Articles
- Frequently Asked Problems with Solutions
- Is Your System Infected with a Virus / Spyware / Adware / Trojan?
- Transform Windows Vista into 7 without using Customization pack
- Transform Windows XP into 7 without using Customization pack
- Transform Windows XP into Vista without using Customization pack
- All About Resource Hacker in a brief Tutorial
- Master Tutorial to Make Your Windows 7 Super Fast
- Master Tutorial to Make Your Windows Vista Super Fast
- Master Tutorial to Make Your Windows XP Super Fast
- All Kinds of Restrictions for Windows XP, Vista and 7



VG
^^ I think yes. But not tested.
Kunal Baraik
by any chance can the upgrade be done by just using the iso file.........as in avoiding to burn the iso on dvd
VG
^^ Of course. Extract content of ISO file using 7-Zip and then run Setup.exe file.
Fakedf
I kept this page open for 4hrs to write a gud comment after checking-out this technique....
but.......
the download of Windows 7 RC is stuck on 99%....
wat to do???
Fakedf
OK NEVER-MIND!!!....
....I figured it out.....
Feri
U know that the beta verjon restarts every two hours......
So when im half way in the upgrade the computer shuts down...... Any help Or advise that can help do the upgrade in windows!?
Fakedf
Awesum awesum awesum..........
Great work!!!.....Works like water.....
Fakedf
Hey VG
I'm facing a prob in win7 regarding games.......
....the games which runs perfectly on win vista, are working slow / hanging in win 7
any idea about that???
waiting for ya reply...
VG
^^ Some games and programs are not yet compatible with Windows 7 so you can see some performance issues. Also it might be a display driver issue. You should wait for the final release of Windows 7, at that time all drivers and programs will be compatible with it.
Fakedf
Hhmmm!!!...
Thanx for the reply.....