Deactivate Windows 7 on Separate HDD

Daniel_miracle_

Honorable
Sep 19, 2013
68
0
10,640
I have a hard drive with windows 7 on it, and I would like to deactivate the copy of windows 7 so I can put it on another computer. The problem is that I can no longer boot from the hard drive. I can, however, access it's files when I connect it to my primary computer. Is there any way to deactivate windows without actually booting from the hdd itself? Thanks in advance.