How to reset password on user and groups?

Reset Computer Password 

Intel Computer

1 - Restart computer and immediately hold Command + r keys

2 - Top Tool Bar >> Utilities >> Terminal

3 - Type resetpassword as one word and no spaces

4 - Press Return key

5 - Follow the prompts and remember the New Password

Look more closely at original Posting - That is because your account is a Standard Account. You will have to contact the Administrator of this computer to make changes.