its unlikely to have anything on the C drive... normally that would be stored on a small backup partition with the name 'recovery' [something like that]... have a look in disk manager [windows key] + [x]... wait a sec then press [k] on most systems anyway should you muck about with it = no...
pro - you can edit which port is used for standard traffic which means common attack hacks fail because they are designed to work on standard networks con - complex custom rules tend to mean other software stops working because they too are designed for standard networks and its normally only...