signature problem 07 noRootcause...boot!

Hi everybody.
I need your help.

I need to know (if exist) the proceeding to restore a windows 7 SO installed on a Hard disk, IN ANOTHER Hardware machine.
Right?
I explain again
Classic problem. on a desktop pc, with him HD (SO. Win7) breaks a motherboard.
Is needed to move an HD from this pc to another one that works corectly. but not only files, I mean the entire phisics hd. Obviously new hardware won't be able to boot correctly an old system...cause drivers conteined from other machine. So, windows7 permit to restore windows 7 with a proceeding from the bootable-cd of Win7.I'v done it but nothing restored and windows isn't able to load until the beginning of a flags logo of windows (after bios shown).
So I tryied to use a command line for restore. bootrec / fixboot fixmbr and RebuildBcd. Again my windows doesn't boot.
I'm trying to understand if exist a way to do this. seems to be so easy stuff to restore a system after an hardware crash, to other machine, WITHOUT format all system...
thanks for help me..
bye guys

Yes.The Hard disk which i'm talking about mount WINDOWS 7 32BIT Ultimate edition. one partition. only these.

what you mean tied? I installed win7 inside this hardware. But why I can't move? why? what I want to do is only a filesystem's restore that adpat my win7 in a NEW machine.
Is it impossible?

sorry. I didn't understand correctly. NO IS NOT AN OEM pre-installed windows .
No I installed by me after severals format proceeding