Tip: Considering the size of the ISO file (under 5 MB), a CD is the most economical disc choice, though a DVD or BD will work just as well if that's all you have.
Burning an ISO file to a disc is a little different than burning ordinary files or music. If you've never burned an ISO file to a disc before, I recommend following the instructions I linked to at the end of the first paragraph above. It's not a difficult process but there are very important things that you need to be aware of.
Important: If the ISO file is not burned properly, Offline NT Password & Registry Editor may not work at all.
After burning the Offline NT Password & Registry Editor ISO image to disc, go to the computer that you're trying to gain access to and continue to the next step.