[Quick fix] Remote user cannot login to the computer. The trust relationship between this workstation and the primary domain failed" error when you log in to Windows.

Situation:

User is not in the office but travelling or works from a remote site.

Reason

1. Lost connection between the ‘client/server’ and the Domain controllers. 

2. Scheduled password change occurs while the server or client is unavailable or has been shut down then the passwords stored in the server/client and the domain controllers for the computer account mismatch, and you will end up getting this error when trying to logon to the server. 

Resolution

Easiest FIX:

1. Login to the computer as local administrator.

2. Connect to the network using VPN.

3. Switch user and ask user to login as himself.

Worked!