How to reinstall boot loader without modifying any partition?

[DrenDran]

For a few years I have windows 7 installed. Someone messed up the boot loader, and rather than quickly fixing it, I did a complete wipe of my harddrive. I still seriously regret that. Then I installed ubuntu, and I used it for a few months. After a while the programs that I needed windows to run started to pile up, so I finally decided to switch to windows. I tried using an old Windows 7 cd, but it didn't work for whatever reason, so I installed XP (had a cd for it) then vista (another old cd) then finally windows 7, all on one partition. Unfortunetly I don't seem to have the option to boot up into ubuntu anymore, although I'm almost positive my ubuntu partition was unaffected.

tl;dr: How do I access an old ubuntu install on a more or less hidden partition?

[Ad Bot]

[KoopaScooper]

boot into your installation medium that you used to install ubuntu, as root run (if you can't become root just use sudo before everything)

lsblk (find your ubuntu partition)
mount /dev/sdx# /mnt (where sdx# is your ubuntu partition)
grub-install --boot-directory=/mnt/boot /dev/sdx (where sdx is your storage medium without a partition number)
umount /dev/sdx#
shutdown -r now

[Nal]

nevermind didn't read properly

[Swat 3]

Actually there is a program you can use on ubuntu that runs window programs.