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Well, system partition was about 30Gb and now its running low, so i cloned the system partition in the same hdd and gave this partition a way more space, so i dont have this kind of problem again. But the question is, how to make the new cloned partition bootable, and can i delete the old system partition after that? I have one hdd with 1TB, and windows 7 is on the usb drive.

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    If you have windows7 installtion media still, boot from that, then choose repair and launch CMD and enter the following commands: bootrec /FixMbr bootrec /FixBoot bootrec /RebuildBcd
    – LSxCPU
    Commented Feb 24, 2016 at 20:55

2 Answers 2

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If it's clone by clonezilla (which should use ntfsclone from ntfs-3g), then the boot sector of the cloned partition is probably not something you need to worry (i.e. it is cloned bootable).

You probably just need to modify the BCD with bcdedit to point the bootloader to cloned partition: https://technet.microsoft.com/en-us/library/cc709667%28v=ws.10%29.aspx

If it's a BIOS/MBR installation, you probably need to mark the cloned partition as active with diskpart as well

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You can use the windows recovery options from your windows install disk to identify existing windows partitions and repair the boot record.

Use the boot recovery options Bootrec as described here

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    How provide specific instructions how it is used.
    – Ramhound
    Commented Feb 24, 2016 at 21:31

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