Q. How can I unbind services, such as File and Printer Sharing and Client for Microsoft Networks, from a network card on Windows Server Core?

A. To unbind services, you need to know the GUID of your network devices. The easiest way to get these GUIDs is to get a list using

wmic nicconfig get Description,SettingID


For example,

C:\>wmic nicconfig get description,settingid
Description                         SettingID
WAN Miniport (SSTP)                 \\{71F897D7-EB7C-4D8D-89DB-AC80D9DD2270\\}
Realtek PCIe GBE Family Controller  \\{76425266-A339-4FCD-AB83-65A2FA6B8342\\}
WAN Miniport (IP)                   \\{2CAA64ED-BAA3-4473-B637-DEC65A14C8AA\\}
Microsoft ISATAP Adapter            \\{0744A7AA-4E35-452D-B98C-BBF75411ECEC\\}
RAS Async Adapter                   \\{78032B7E-4968-42D3-9F37-287EA86C0AAA\\}
Realtek PCIe GBE Family Controller  \\{1BD08599-331A-4DE1-BAF9-8F7F6FA5A751\\}

You can also look under HKLM \SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards, which lists the GUIDs for the network cards.

If you have multiple cards with the same hardware name, go to HKLM \SYSTEM\CurrentControlSet\Control\Network, open the GUID and under the key, and view the Connection sub-key, which will show the name of the network connection associated with the GUID of the card, as you can see below.

Adapter name view

Once you have the GUID of the NIC, you want to unbind the services from HKLM \SYSTEM\CurrentControlSet\services\\Linkage\Bind value. Open the value and delete any line that has the GUID of your NIC, then click OK.

Common services are:

  • LanmanServer—File and Printer Sharing for Microsoft Networks
  • LanmanWorkstation—Client for Microsoft Networks
  • lltdio—Link-Layer Discovery Mapper I/O Driver
  • rspndr—Link-Layer Topology Discovery Responder

For example, to unbind File and Printer Sharing, go to HKLM\SYSTEM\CurrentControlSet\services\LanmanServer\Linkage, double-click Bind value, and delete the lines that have the GUID of the NIC.

File and Printing Service

You can also look at nvspbind, a tool available for download from Microsoft that lets you manage binding from the command line.

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