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~"Pre-release version expires in 12 days, please back up and reins

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Before installing, I used rt7lite to customize my legitimately licensed Windows 7 Ultimate installer to save space and to slipstream service pack 1 beta.

Now I'm realizing that the latter may have been a poor choice. I cannot uninstall service pack 1 beta to install the final service pack, and the above message has just appeared.

It would be a big hassle to re-configure my Windows installer, let alone backup and re-install. Is there anything I can do to mark this copy "non-pre-release"?

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    after Windows 7 GA still Vista lover :)

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you can't do this. Back all data and install Windows again.
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    Gustatus similis pullus

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The beta is timebombed - since you used rt7lite to slipstream it, it cannot be reinstalled or modified in any way, at least not one that would make your system potentially unbootable in the future. I concur with MagicAndre, you should simply back up and reinstall - you will not be able to install post-SP1 hotfixes after a short time once they drop the pre-release build from the list of acceptable install builds, and you'll be up the proverbial creek without a paddle.
MCTS Windows Internals, MCITP Server 2008 EA, MCTS MDT/BDD, MCSE/MCSA Server 2003, Server 2012, Windows 8
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