Windows Password Issue

Hello all, I've come to the worrying conclusion that I forgot my windows password. However, I have had access to it all along as I know the pin, but I don't know if I'd need the password to upgrade to windows 10.

My brother has an admin account too, these are both admin accounts, but mine I only know pin as I have not used my password in months. Anyway to reset it considering I have access to every thing on my PC?

 
Solution
Have your brother log into his admin account and use it to force a password change on your account. You really should know your password.
it kind of assumes your account is being validated locally by the machine.

You may also have a account that is validated by a internet service like microsoft's account.
in that case you can contact microsoft support and reset your password.

you can start cmd.exe as an admin then run
net.exe config rdr


it should show your username and the logon domain name (in my case MicrosoftAccount because they validated the logon)

if you logon to a local account you should be able to use
net.exe /user:yourusername *
to change the password.

(it does not assume you know the old one)