Common Windows Error Messages
Windows 95/98
Computer is not receiving a response from the modem
Error 629: Port disconnected by the remote computer
Error 630: Port Disconnected Due to Hardware Failure
Error 645: Internal Authentication Error
Error 650: Server not Responding
Error 666: Device not Ready
Error 678: No Answer
Error 691: Username - Password Invalid
Error 731: Protocol Not Configured
Error 781: The encryption attempt failed because no valid certificate was found
Dial-Up Networking could not negotiate a compatible set of network protocols.
Solution 1
Solution 2
Solution 3
Dial-Up Networking Password Option Unavailable
Disable IPX Header Compression
HyperText Transfer Protocol Error
Microsoft Dial-Up Adapter is not installed.
Modem does not exist, is not plugged in, or is out of service.
Solution 1
Solution 2
Windows NT 4.0
Error Access Denied