Installing Driver for Legacy Network Adapter on Win2k3 x64 VPC (Hyper-V)

Overview

I installed a 64-bit Windows 2003 R2 Enterprise SP2 on one of my Hyper-V VPC, and add a Legacy Network Adaptor to it. However the network adapter is not automatically installed in the x64 win 2k3 because its driver is not available.

With some Googling I found that 64-bit version of win 2k3 and xp are not supported with corresponding Legacy Network Adaptor driver. Someone suggested a workaround by using the equivalent Vista driver (both x86 and x64).

So I go the driver files from a machine running on x86 Vista and tried it. But the driver installation terminated with Error: "Driver not intended for this platform".

Suspecting this maybe due to the x86/x64 difference, I got another set of driver files from a x64 Windows Server 2008. This time the driver installation ran smoothly and the Network Adaptor works well!

Directory containing Legacy Network Adaptor driver:

Vista:
%windir%\system32\driverstore\FileRepository\dc21x4vm.inf_7d8c6569

Windows Server 2008:
%windir%\system32\driverstore\FileRepository\dc21x4vm.inf_e14caac7

Reference

Windows XP x64 in Hyper-V - Network Drivers