0

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
  • 1,462
  • 7
  • 24
  • 48
  • It might be due to the permission issue, so please use sudo chmod 755 /etc/grub.d/40_custom and then reboot the machine. Hope this will help you to fix the issue. – BDRSuite Jan 19 '15 at 07:34
  • Did you use the BIOS to change the boot order when installing to the 1TB drive? (grub only installed on the 1TB so doesn't detect the windows on the 80G) – Fabby Jan 21 '15 at 11:09
  • @Fabby Change the boot order to what? The computer is set to boot from the 1TB drive with Xubuntu and doesn't detect Windows. Running sudo update-grub shows that it doesn't detect Windows at all, with the drives mounted and unmounted. UPDATE: I think the problem was that Windows was installing updates or hibernating so it couldn't be detected. How do I boot into Windows to correct the problems? (The BIOS only gives an option to boot from hard drive, but won't let me choose a specific drive, and just boots to the 1TB one.) – John Scott Jan 21 '15 at 21:31
  • It turns out that I had installed Windows incorrectly. I reinstalled and the dual-boot works good now. We can close this. – John Scott Jan 27 '15 at 00:30

1 Answers1

1

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
  • 1
Philippe Gachoud
  • 5,900
  • 3
  • 43
  • 50