How to restore GRUB after restoring MBR with boot-repair?

I've a problem after upgrading to 12.10, which is when I choose Windows option from boot options, I got "A disk read error occurred" error.

I followed this tutorial to restore MBR, but the problem now that the Grub is gone and it boots directly to Windows 7.

What should I do now to restore both Windows 7 & Ubuntu?

2 Answers

You could always download and use Resc-a-tux.

This is a live cd with a primary goal: Restoring grub/installing grub. It's a nice program which I used after windows just removed my grub without asking, and it worked like a charm.

Rescatux features:

Fixes GRUB and GRUB2

Regenerates Debian/Ubuntu grub menues

Check and fix filesystems

Fixes Windows MBR

Blank Windows passwords

Boot Info Script

Change Gnu/Linux password

Regenerate sudoers file

Extra tools:

Synaptic

Gparted 0.7

4

Run Boot-Repair, and click Advanced Options.

1. If the GRUB reinstall option is available, tick it, and click Apply.

2. If the GRUB reinstall option is not available, that means that your Ubuntu upgrade has failed and broke your Ubuntu system files. Then fix your Ubuntu system files via a Ubuntu12.10 liveCD (or liveUSB) this way:

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