But then, the distance grew. Perhaps the laptop was left in a drawer for too long, or a system restore forced the DC to travel back in time, forgetting the password the workstation had last promised it. When you finally tried to log in, the DC looked at your machine’s credentials and saw a stranger. The "Secure Channel" was severed. The trust was gone. The Path to Reconciliation
Before trying any fix, you must gain access to the machine. Since domain credentials won't work, you need a local administrator account. At the login screen, click .
Best if you have local admin access and physical access to the server is difficult, but you have domain admin credentials.
In simple terms, your computer and the server (Domain Controller) have a "secret handshake" (a secure password) that changes automatically every 30 days. If your computer was turned off for a long time, restored from an old backup, or if the connection was interrupted during a password change, the "handshake" no longer matches. The server no longer recognizes your PC as a trusted member of the network.