Microsoft Kernel Debug Network Miniport (NDIS 6.20) (kdnic_legacy) Service Defaults in Windows 11

The Microsoft Kernel Debug Network Miniport (NDIS 6.20) service exists only in:

Default Settings

Startup type: Manual
Display name:Microsoft Kernel Debug Network Miniport (NDIS 6.20)
Service name:kdnic_legacy
Service type:kernel
Error control:normal
Group:NDIS
Path:%SystemRoot%\System32\drivers\kdnic_legacy.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\kdnic_legacy

Default Behavior

Microsoft Kernel Debug Network Miniport (NDIS 6.20) is a kernel driver. In Windows 11 it starts only if the user, an application or another service starts it. If Microsoft Kernel Debug Network Miniport (NDIS 6.20) fails to start, the failure details will be recorded into Event Log. Then Windows 11 should boot up and notify the user about the kdnic_legacy service startup failure.

Restore Default Startup Configuration of Microsoft Kernel Debug Network Miniport (NDIS 6.20)

1. Run the Command Prompt as an administrator.

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

sc config kdnic_legacy start= demand

3. Close the command window and restart the computer.

The kdnic_legacy service is using the kdnic_legacy.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 11 installation media.