I made my laptop Dell XPS 15z dual boot with Ubuntu last year, and something went wrong & BOOTMGR of my windows got fried. I couldn't fix it that time. And I kept using Ubuntu. I don't even remember whether I installed directly via a live usb or used wubi, sorry.

I installed 11.10 at that point of time, but right now I am on 12.10.

Today, I got to know about the Boot repair tool, so I was wondering with this tool may be I can figure out what's exactly wrong with my setup.

This is my Boot info - http://paste.ubuntu.com/1343575/

If I select the Win7 entry on GRUB2, I get the error BOOTMGR is missing. Press Ctrl-Alt-Del.

Now the thing is I have read numerous links on how this could be fixed, but I don't feel comfortable without knowing what I am doing. So unless I am sure what a certain tool would do, I would prefer fixing it by hand (manually editing files).

So reading from my boot info file, can anyone explain it to me what's messed up wrong here and what could fix it? I certainly can't afford to have my ubuntu install unbootable right now, but looking into this issue is bothering me too much. Help appreciated!

I have Win7 DVD & Ubuntu live USBs with me, I am just looking for a sure shot way of fixing Win7 without any harm to my existing Ubuntu install.