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Using Clonezilla, I cloned a Windows 7 installation from the first partition on one drive to the first partition on a second larger drive and then installed Ubuntu into the second partition (same configuration as the original drive, just newer version instead of old).

Ubuntu detected the Windows 7 partition properly and added it to the grub menu. However, when I choose the win7 option in grub, I just get a black screen and blinking cursor. How can I fix this?

@CentaurusA: Here is the output of boot info script output

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Is the original hard drive still installed on the system? – Mark Rooney Mar 5 '11 at 23:34
you may need to restore your Windows PBR – Takkat Mar 6 '11 at 8:03
@Mark: Original drive is no longer present. @Takkat, I'm trying to find out if there is a way to do this without having to reinstall grub / ubuntu. – bumbling fool Mar 21 '11 at 21:36

Try running Boot Info Script ( This will produce the file RESULTS.txt that describes each disk/partition on your system. Check that GRUB2 is identifying the partitions correctly by comparing the descriptors used in the menuentries in /boot/grub/grub.cfg match those in the results file. I have an issue where GRUB2 mis-identifies my Vista and Windows' recovery partitions and doesn't boot correctly as a result. The fix was to create a custom boot menu (see

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Thanks for your answer. My inexperienced eyes don't see anything wrong in the output. There are no recovery partitions of any sort either :/ – bumbling fool Mar 21 '11 at 21:53

1. Boot from Windows Recovery CD, Windows Recovery Partition, or Installation CD

2. Click on "Repair your computer"

3. Click on "Startup Repair"

4. Windows should now boot properly

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I was look for a solution that would not entail reinstalling grub again after repairing Windows. – bumbling fool Mar 18 '11 at 19:13

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