I don't have any technical knowledge of Ubuntu but wanted to install it on a partition. Step-by-step of what i did.

1. used disk management in windows 7 to clear 50gb of space
2. used a usb live ubuntu 12.04 installer in custom install mode
3. used the installer's built in disk manager to set up 2gb swap space and 48gb ext4 space
4. ran installation, with option to copy over documents and settings from windows 7
5. restarted after completion.

After this, my computer automatically loads ubuntu 12 and skips the option to load windows 7. i know the files are still there, as i can see them in the file manager. When trying to fix with the win7 installer dvd it tries to repair the OS in drive [D:] i.e. it recognises the disc itself as the OS and ignores the [c:] files.

I think, after browsing around here, similar problems suggest this is a problem with the boot loader, but if the win7 dvd won't work, then i don't have any way to fix this. does anyone know of a way to force the computer to show a "choose OS" screen?