Have you forgotten your Mac’s admin password, or need to help a friend or client who has lost it? Here’s how to reset it, but beware that doing so prevents access to the account keychain’s collection ...

If 'Users must enter a username and password to use this computer' option is missing in Windows 11/10, use Settings or Registry Editor to fix the issue.

Get an added level of protection by activating this back-up administrator account in Vista and by safeguarding it in XP.

All you need to do is enter "root" into the username field, leave the password blank, and hit Enter a few times. Needless to say, this is some scary stuff.