Medic was installed when I first started with Roadrunner a few months ago, but they upgraded to 4.0 a few weeks ago. You don't have a little suitcase or other icon in the lower right hand corner of your screen, in the system tray? It is just a little tool that continuously monitors your computer, internet connection, and e-mail and news server connections. If you have a problem, you are supposed to use it to diagnose and repair the problem with your connections. Don't know if it is really necessary or not - I never have any problems with any connections, except this damn BEEPING!
If you ctrl-alt-del, medic shows up as "Rrmedic." If you want info on Medic, or want to download it, the roadrunner help screens in member services has info on it. Sounds like you get along without it just fine though.