I had 11.10 installed and everything worked fine until I decided to upgrade to 12.04. Now I still see the Windows 7(loader) option in GRUB but when i choose it the screen goes black for a second and then returns to grub. I tried using boot-repair but it didn't work.
Here's the log from boot-repair: http://paste.ubuntu.com/869127/ . How can I get my windows back ?