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...
dwm is not just an app but the backbone of Windows and nothing short of adding more Ram is going to improve things ... Im sorry if that wasn't clear good luck with your project