Successful 'In Place' upgrade RC -to - RTM


  1. Charlie9292
    Posts : 7
    Windows 7 RTM
       New #1

    Successful 'In Place' upgrade RC -to - RTM


    This may well be 'old news' for most but I have not yet seen a post verifying this particular 'MS unsupported' upgrade path, namely from Build 7100 RC to build 7600 RTM. It requires editing a file (cversion.ini) in the sources folder of the 7600 RTM file set. The original file contents read:
    [HostBuild]
    MinClient=7100
    nServer=7100

    If one edits it to a similar number lower than 7100 then the RTM install WILL do an in-place ugrade. My cversion.ini file contents are:
    [HostBuild]
    MinClient=6600.0
    MinServer=6600.0

    With this simple edit Win 7 build 7600 did present the Upgrade installation choice and proceeded to do so without a hitch. :)

    I am posting this for those that choose to do an inplace upgrade from RC to RTM and would oterwise be prevented by MS from doing so. I always recommend a clean install, and do so myself. However through the years I have done many inplace upgrades with no issues.

    Upon final reboot the PC this upgrade was done on several days ago, has worked a treat, and has had 0 (zero) issues.
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  3. ddeen
    Posts : 40
    Windows 7 RC 7100
       New #2

    Thanks for the post, I think we have seen several RC to RTM upgrades that have gone ok. What the trouble will be is all the folks that have pre-ordered the Home Premium or Professional Upgrade and are currently running Ultimate RC, I think the consensus is that those folks are SOL, they will have to blow away their current 7 install, and then re-install either XP or Vista, activate it, and use the upgrade, there is no upgrading of an unactivated OS anymore unless it is Win2000.
    Last edited by ddeen; 15 Sep 2009 at 18:42.
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  4. sup3rsprt
    Posts : 1,557
    XP, Seven, 2008R2
       New #3

    ddeen said:
    re-install either XP or Vista, activate it, and then upgrade it, there is no upgrading over the top of an unactivated OS anymore unless it is Win2000.
    So the cat is finally out of the bag ey?

    Problem: You can't upgrade XP to 7. You need to do a clean install.

    What you are saying is that people with XP must already have it activated in order to use the upgrade version of Windows 7? Where did you get this information?
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  6. ddeen
    Posts : 40
    Windows 7 RC 7100
       New #4

    Saw it on Windows 7 Forum on technet a little while ago. Yes, that is what I meant, to use the Upgrade version whether or not you actually upgrade over the top of whatever OS you are running or you do a custom install, the original OS must be activated if XP or Vista. Win2000 of course has no activation.
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  7. ddeen
    Posts : 40
    Windows 7 RC 7100
       New #5

    Upgrade Media and Previous OS Activation
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  8. sup3rsprt
    Posts : 1,557
    XP, Seven, 2008R2
       New #6

    Thanks for the link. :) If only Microsoft could make this kind of info available sooner. Whether or not we can do a clean install using the upgrade media (and if/how it works) has been one of the top questions.

    btw, ddeen didn't double post. I deleted my earlier post.
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  10. jfar
    Posts : 5,840
    Vista Ult64, Win7600
       New #7

    Thanks for the info.
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