KB166184 - Event ID 3870: Not a Valid Computer Name

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If the WINS server is multi-homed, check for split registration. If the WINS server has split registration, configure the Primary and Secondary WINS entries on both network adapters with the IP address of only one of the adapters.

The Event ID: 3870 will usually occur first. It causes a cascade of failures that may include the following error messages:

Event ID: 7023
Source: Service Control Manager Error
The Workstation service terminated with the following error:
A duplicate name exists on the network.

Event ID: 7001
Source: Service Control Manager
The Messenger service depends on the Workstation service which failed to start because of the following error:
A duplicate name exists on the network.

Event ID: 7002
Source: Service Control Manager
The TCP/IP NetBIOS Helper service depends on the NetworkProvider group and no member of this group started.

Event ID: 7001
Source: Service Control Manager Error
The Computer Browser service depends on the Workstation service, which failed to start because of the following error:
A duplicate name exists on the network.

Event ID: 7001
Source: Service Control Manager Error
The Alerter service depends on the Workstation service which failed to start because of the following error:
A duplicate name exists on the network.

Event ID: 3870
Source: Workstation
<computer name> is not a valid computer name.

Event ID 3870: Not a Valid Computer Name

SYMPTOMS

CAUSE

RESOLUTION

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