Manual WinpkFilter driver installation is covered by my post above. As for possible network configuration problems it is not that easy to advise as I have no idea what may have happen. Most probably there was unsuccessful instillation of the driver which has left some remnants in the system registry and does not allow to install the driver once again. You can check if the registry key HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesndisrd exists on the target system.
