It's recommended to have (at least) two administrative accounts, just in case something (anything this is just an example) happens with the first.
And it's recommended to store passwords (both local and Internet, and don't forget to include the pin-code for your creditcard) in a password manager (Keepass is free).
So consider to follow these 2 best practices when you're up and running again.
Anyway, we usually advise to use ntpasswd from http://pogostick.net/~pnh/ntpasswd/ to reset a Windows password.
Member willy linked to an alternative method in https://www.cnet.com/forums/discussions/win-8-password-recovery-reset-616078/ ; it works in Windows 7 also.
Forgot Administrator Password
I changed my Admin password on 10-1-16, forgot what i changed it to. Ive tried everything from CMD to USB RESET.