Repair unbootable Windows 7?

Is there a tutorial for how to use command prompt to repair unbootable W7? I tried automatic repair method but it did not fix the problem. There is no restore point or restore image. So, I want to try command prompt but do not know how it can be used to repair.

have you just tried a regular repair off the disc?
Also exactly what is the problem?
This works sometimes if it's just corrupt files.
http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html

it requires you to be able to start windows though.
Your post it kind of confusing because it sounds as if you are able to boot.
If that is the case this should work
http://www.sevenforums.com/tutorials/3413-repair-install.html

I could give better info if I had more regarding the actual problem you are having.

If you can't boot Win7 then you need the steps here for Troubleshooting Windows 7 Failure to Boot.

Everything that can be done is there, leading up to last-resort Factory Recovery or Clean Reinstall.