Your computer is not installedlinux + windows dual system? Debian linux is not your family? 7 is not a win?
Reinstall win7，Overwrite the grub2? win7 can not grub4dos? Unable to boot linux? New，perfect，Favorite linux only heavy equipment?
Do not! You are lucky，Perhaps before you have to do，But you see[……]
Linux
UB、RH、LD、FB……