If you uninstall RAS, your System Event Log may contain the following (when you restart):
Event ID : 4119 Source : TCP/IP Description: IP could not open registry key for NdiswanX.or
Event ID : 4311 Source : NetBT Description: Initialization failed because the driver device could not be created.To fix the problem, use Regedt32 to navigate to:
Double-click the Adapters key and delete all sub-keys that starts with NdisWan.
Shutdown and restart your computer.