Add Windows 7 to GRUB (Dual Boot)

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http://crunchbanglinux.org – I installed Crunchbang today with the intention of dual booting, but Windows is not in my GRUB menu...I've looked around and tried some things, but GRUB still isn't seeing Windows. Here are some commands I've run:user@crunchbox:~$ sudo os-prober grub-probe: error: cannot find a GRUB drive for /dev/sdb1. Check your device.map. user@crunchbox:~$ sudo update-grub Generating grub.cfg ... Found background image: /usr/share/images/desktop-base/grub-splash-crunchbang.png Found linux image: /boot/vmlinuz-3.2.0-3-amd64 Found initrd image: /boot/initrd.img-3.2.0-3-amd64 grub-probe: error (HowTos)