What is the of the legacy device or software you are trying to connect? Are you running a 32-bit or 64-bit version of Windows?

The most robust "fix" is to run a legacy OS (like Windows XP) within a virtual machine (using VirtualBox or VMware) and bridge the network adapter.

In Windows Vista, Microsoft completely rewrote the networking subsystem, introducing the Next Generation TCP/IP Stack and the Network Driver Interface Specification (NDIS) 6.0 architecture.

After extensive testing across Windows 7 SP1, Windows 10 (legacy), and Windows 11 22H2/23H2, we have developed a . Do not attempt the standard copy-paste method. Follow this exact protocol.

Here is the definitive guide to fixing this issue and forcing NetBEUI to work on modern 32-bit and 64-bit Windows operating systems. The Core Problem: 32-bit vs. 64-bit Architecture