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I helped a friend of mine dual-boot Xubuntu 14.04 and Windows 7 Professional. I put WIndows 7 on a 80GB hard drive and put Xubuntu on a 1TB drive. I booted into Xubuntu and ran update-grub, but it didn't detect Windows. I tried doing it with the drive mounted and unmounted. Also, the system uses BIOS, not UEFI. It is a fresh Windows 7 installation so it is by no means fragmented or damaged and I fully shut down the system. What do I do now?

John Scott
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1 Answers1

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I had the same problem, os-prober did not detect my installation either, it was because on my windows 7 partition there was files missing...

  • /grld
  • /Boot/BCD

Don't know the utility of these files but was missing... I copied them from other windows install and solved the problem

pg@pipoTower: ~$ sudo os-prober 
/dev/sda1:Windows 7 (loader):Windows:chain
/dev/sdc1:Windows 7 (loader):Windows1:chain
/dev/mapper/lvmvolumeSda6-root:Ubuntu 15.04 (15.04):Ubuntu:linux

Possible duplicate

GRUB does not detect Windows

Community
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Philippe Gachoud
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