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when i try to partition the C drive on my laptop using an application, and I managed to partition, then I restarted again, and this is where the problem arises, my laptop can not boot to get into windows, what happened? if anyone can have a solution for my problem?

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Probably your BCD Entries were erased and are missing...

Boot WINPE on your machine or even a Windows DVD instalation and go to the command screen provided on the "open command promt"(or something like this) on advanced instalation options and run the following command:

bcdboot c:\Windows

Also, look this reference if having problems on this procedure.

This will create your BCD Entries again.

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Alternatively, the auto-startup-repair facility on the Windows 7 Installer disk is pretty good at automatically finding and fixing BCD-related problems, so long as the partition containing your OS install is readable. – Zac B Jun 14 '12 at 14:53
Good point, it is basically the same thing. – Diogo Jun 14 '12 at 15:16

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