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I had a dual boot system with Windows 7 and Ubuntu 14.04. The dual boot used to work perfectly but after some days of happily using Ubuntu I realized that the option to boot into windows 7 disappeared. I tried the boot repair but still my windows doesn't seem to work. Tried using the windows installation CD and did a repair installation but still it didn't work. This is the summary of by boot repair. Can someone please help me with this.

http://paste.ubuntu.com/11142546/

  • Do you need Windows, or just some files? – davidbaumann May 15 '15 at 8:15
  • Can you check if /etc/grub.d/30_os-prober has some content? If it has, that means that something is wrong with your BIOS. – Danatela May 15 '15 at 9:15
  • did you run 'sudo update-grub'? – Ron May 15 '15 at 9:19
  • Hi David - I need windows. Hi Dantela - /etc/grub.d/30_os-prober does have some content. and I did run update-grub – Aditya Menon May 17 '15 at 10:19
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As temporal solution, you can add these lines into /etc/grub.d/40_custom:

menuentry "Windows 7 (loader) (on /dev/sda3)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos3)'
chainloader +1
}

then sudo update-grub.

  • After adding these in the /etc/grub.d/40_custom: I see the option for windows 7 but it gives an error while booting into windows. Thanks a lot for you help Danatela – Aditya Menon May 17 '15 at 10:24

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