1. Start your win 8 computer and press “F8″ while the computer boots up. Scroll down to “Safe Mode with Command Prompt” with the arrow keys on the keyboard and press “Enter.” Your computer starts in Safe Mode with Command Prompt. 2. Select the Administrator account that appear in the screen, then enter command prompt. Type: net user ****** 123456 and enter (****** is the account name which password you need to reset 123456 is the new password), it will show you a message that” the command completed successfully. 3. Restart your win 8 computer, then you can log in as ****** with the password 123456. You can go to control Panel to change your account password if necessary.
I think they'd need to change the default boot to legacy to enable f8. Alternatively they can go into the recovery menu using "shutdown /r /o /t 0' and select the advanced startup option. It should list the safe-mode selection in the menu when doing that.