This is one of the most frustrating errors to encounter on a corporate or school network. You try to log in, and instead of your desktop, you are met with a black screen and a message stating the trust relationship has failed.
If you cannot log in to the computer at all, you must fix the issue from the (the server).
To mend this broken relationship, you must act as the mediator. Here is how you can restore the trust:
Type .\ followed by the local username (e.g., .\Admin ) to ensure Windows looks for the account on the local PC rather than the domain. Enter your local password.