Final answer:
Unable to reach domain controller, locked user account, and incorrect time and date can prevent logging into a domain-joined computer.
Step-by-step explanation:
The following factors could prevent you from logging into a domain-joined computer: unable to reach the domain controller, locked user account, and incorrect time and date.
If you are unable to reach the domain controller, it means that your machine cannot establish a network connection with the server that holds the user accounts and authentication information.
A locked user account occurs when someone enters the wrong password multiple times, causing the account to be temporarily disabled for security reasons.
Incorrect time and date could pose a problem because computers rely on accurate time synchronization to authenticate users and establish secure connections.