Can't believe how easy it is to hack a Windows password

I sometimes see those "Hack any Windows password" videos on the sidebar of YouTube and I've always thought they would be nonsense, or some link to download a suspect .exe that claimed to do it for you. Well out of curiosity I just watched one and couldn't believe how simple it was. Not the kind of thing that many people are going to happen upon on their own, but a few short steps nonetheless. Just a matter of powering off at the right moment, going through the "repair" process on relaunch, and through this gaining access to the file system whereupon you can rename a couple of Windows files, type a command in CMD and voila, you're in! The back door is basically Windows giving you access to a file picker to save some "terms & conditions" text file or other. With this glaring insecurity you can thus rename the appropriate files. 
 
Jeez I never thought that my Windows password was 100% foolproof, but I did perhaps think that it would at least be a little difficult to hack it. I never knew it was something so easy that a 10 year old kid (even a non-nerdy one) could do it.

Yes, the Windows account passwords have had downloadable cracking programs available forever. About the only thing MS has come up with that offers any significant security is Bitlocker applied to the whole drive. 

I just want to make sure that my suitcase-size quantum cold fission generator plans don't get out until I can patent them.  The same applies to my scrambled eggs recipe.