1) Turn on your computer, and as soon as you the Press Esc to enter grub message, press the escape key.

2) Select the option that says (recovery mode).

3) Your PC will boot into a shell. Once you get a command prompt, type “passwd username” where the username is your username. If you can’t remember your username, then you can type “ls /home” which should bring it up.

4) Enter a new password when prompted, and again when prompted again Type “shutdown -r now” to reboot your system,