Systems Management

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What I have understood from your post is,

Setting DisableRollback to 1 under the following registry key:HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Installer

disables the rollback option in Windows XP operating System.

Will it work on Windows 7?

Is this your question? If so, Yes.. It will work..

http://msdn.microsoft.com/en-us/library/windows/desktop/aa368307(v=vs.85).aspx

http://maximumpcguides.com/windows-7/prevent-windows-installer-from-being-able-to-rollback-an-install/

You can set Property:

PROMPTROLLBACKCOST=D

in your MSI to disable the rollback.