windows 7 - How to access computer without password

So I never really post questions in forums like these but this one has got me stumped. So I upgraded my windows 7 computer to Windows 10 and didn't like it plus things were messing up. I decided to go back to factory defaults because the one month grace period had expired. After restoring my system the only account that shows up when turning the system on is the user account which is password protected. I'm assuming the store we got the system from, Colortyme, had set up these defaults because the password hint was "STORE". Needless to say guess and check hacking meathods are very unreliable. I know about the exploit where you can rename the command prompt something accessible through the ease of access such as the sticky keys and then run it at the login screen with admin privileges which would allow me to change passwords but the only problem is the only way I know how to access those files before login is by crashing the computer and booting system repair. Unfortunately Windows has patched that... So my question is how should I go about this? I can only think of two options right now the first is to boot the system off a flash drive with a Windows iso file on it and change the settings that way. The other is reset the password using a password reset disk iso file on a flash drive. I don't have an actual password reset disk so yeah... Please help and let me know if any of those options would work or if there is a better option