By my understanding, routing capability was removed from Windows since Vista and is only
available now in Windows Server.
The following trick can be found on the Internet to re-enable
netsh routing, which you can try at your own risk.
I suggest first the usual precautions, including creating a system restore point.
- Get IPMONTR.DLL and IPPROMON.DLL from 2003 or from XP
- Copy them to WINDOWS\SYSTEM32
Run in Command Prompt (cmd) as administrator :
netsh add helper ipmontr.dll
netsh add helper ippromon.dll
You might also need to set the Routing and Remote Access Service to Automatic startup.
Reboot before trying anything.