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I'm in need of help to repair my Dual OS (Windows & Ubuntu), I installed Ubuntu after installing Windows 7 but GRUB menu doesn't show Windows 7 option to select.

I'm here to ask how can I make my computer a dual OS boot such that Windows 7 is already installed.

Disk /dev/sda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders, total 78165360 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000abaf4

Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *        2048    74010623    37004288   83  Linux
/dev/sda2        74012670    78163967     2075649    5  Extended
/dev/sda5        74012672    78163967     2075648   82  Linux swap / Solaris


Disk /dev/sdb: 500.1 GB, 500107862016 bytes

255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xf449f449


Device Boot      Start         End      Blocks   Id  System

/dev/sdb1   *          63   251658224   125829081    7  HPFS/NTFS/exFAT
/dev/sdb2       251658225   503316449   125829112+   f  W95 Ext'd (LBA)
/dev/sdb3       503316450   754974674   125829112+   7  HPFS/NTFS/exFAT
/dev/sdb4       754974675   976768064   110896695    7  HPFS/NTFS/exFAT
/dev/sdb5       251658288   503316449   125829081    7  HPFS/NTFS/exFAT
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1 Answer 1

Strongly recommend this utility

https://help.ubuntu.com/community/Boot-Repair

Used it several times to recover my "Windows"

You can use the Live-CD to install it and then use it to recover your Windows partition back into the grub boot menu.

As part of the process of running this utility it generates a report and stores it here http://paste.ubuntu.com/5592460/ so you can refer to it later. The link is an example of someone else who had their grub repaired.

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