Windows Networking Firewall failure Error
Upon trying to open and configure the Windows built-in Firewall, you receive the error:
"Windows Firewall can not run because another program or service is running that might use the Network Address Translation component (IPNat.sys)"
Cause is due to settings left in by "Routing and Remote Access" service. Even if the service is stopped, Windows will still report this error because the network card bindings are still being held by RRAS.
Disable RRAS by opening the MMC for it and "Disable Remote Access and Routing". This can also be found by Right-clicking "My Computer", opening the Service and Application node.
By Disabling RRAS in this way, the network protocol interface bindings are removed allowing for the Windows Firewall and Connection Sharing service to take over.