An administrator must use the password complexity not manufacturer-name command to prevent users from adding "cisco" as a password. Which command must be issued before this command?

The `password complexity enable` command globally activates the password complexity feature on the Cisco device, allowing subsequent commands like `password complexity not manufacturer-name` to enforce specific complexity policies. Without enabling this feature, any defined complexity rules would not take effect.

`confreg 0x2142` is used to change the configuration register, typically for password recovery or boot sequence modification, and has no direct relation to password complexity features.

`login authentication my-auth-list` configures an authentication method list for login, which is separate from defining password complexity rules for user passwords.

`service password-encryption` encrypts passwords in the running configuration, but it does not enforce any password complexity rules themselves.