This seems to be self explanatory just insert the Win 7 CD and follow the below given instructions and then enter the commands one by one as mentioned below strictly without missing anyone of them.

Select your language preferences and click on Next.

Click on Repair your computer.

Select which operating system you want to restore and the click on Next. If Windows 7 is not listed here, or it is blank, then it is ok. Click on Next anyway.

Select the system recovery option you want to do:

Startup Repair

System Restore

System Image Recovery

Windows Memory Diagnostic

Command Prompt

If you managed to recover Windows 7, will have lost Grub should reinstall.

Insert the Ubuntu Desktop live-disc into the DVD drive and restart the computer.

Select Try it.

Open a terminal.

Run it:

sudo -i
fdisk -l
#Suppose fdisk informs your partition / is /dev/sda3, continue running
mount /dev/sda3 /mnt
mount --bind /dev /mnt/dev 
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
chroot /mnt
grub-mkconfig -o /boot/grub/grub.cfg
grub-install --root-directory=/mnt /dev/sda
grub-install --recheck /dev/sda
umount /mnt

That’s it.

via – arch wiki & Microsoft forums.

By Akash Angle

I am a Full time Linux user who has quit using Windows for unknown reasons, making my life truly open source.

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