If you receive:
Error starting Remote Access Service on <servername>. Check the Event log on
and the System event log on that server contains:
Event Id 7000 - The NetBEUI Protocol failed to start due to the following error: The system cannot find the file specified.
Event Id 7001 - The Remote Access Service depends on the NetBEUI protocol service which failed to start because of the following error: The system cannot find the file specified.
after installing RAS, the Nbf.sys file may be missing or corrupted.
Remove the NetBEUI protocol (Control Panel / Network), reboot, and reinstall it.
Don't forget to reapply your latest service pack.