Windows Error 691 — Authentication Failed

Overview

Windows network error 691 means the remote connection was denied because the username and password combination was not recognized.

Key Details

• Error 691 — access denied during network authentication
• Username or password rejected by the server
• Common with VPN and dial-up connections
• ISP may have changed credentials

Common Causes

• Incorrect username or password entered
• ISP changed authentication credentials
• Caps Lock is on when entering password
• Account expired or suspended by ISP

Steps

1. 1Double-check username and password — watch for Caps Lock
2. 2Contact ISP to verify correct credentials
3. 3Delete saved credentials and re-enter
4. 4Check if ISP account is active and not suspended

Tags

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Frequently Asked Questions