NetBios over Tcpip (NetBT) Service Defaults in Windows XP

NetBios over Tcpip.

Default Settings

Startup type: System
Display name:NetBios over Tcpip
Service name:NetBT
Service type:kernel
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetBT

Default Behavior

NetBios over Tcpip is a kernel device driver. In Windows XP it is starting right at Kernel initialization. If the NetBios over Tcpip fails to start, the technical information about the error is added to the Event Log. Windows XP startup should proceed, but a message box should be displayed informing the user that the NetBT service has failed to start.


NetBios over Tcpip depends on the TCP/IP Protocol Driver service.

The following components depend on NetBios over Tcpip:

Restore Default Startup Configuration of NetBios over Tcpip

Before you begin doing this, make sure that all the services on which NetBios over Tcpip depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt.

2. Copy the commands below, paste them into the command window and press ENTER:

sc config NetBT start= system
sc start NetBT

3. Close the command window and restart the computer.

The NetBT service is using the netbt.sys file that is located in the C:\Windows\system32\DRIVERS directory. If the file is removed or corrupted, read this article to restore its original version from Windows XP installation media.