so i have 2 drives, a c and a d drive. forgive me for sounding stupid

but uh, i dont know what game servers are like i know they are 24.7 and thats what i want.
I just dont wanna have to pay for it, so can i turn my c drive (which i dont use) into a dedicated game server that just hosts a server 24.7. for my bhd (as long as my computer is on, or like can i get a program that lets the hosted server just run in the background? can i get a dedicated server without paying for it -_-
sorry if i sound stupid.