Re-Installing Win 95

I recently had to figure out how to put in a new bios password so I could access this machine that was given to me. Now I want to installl Win95. I have a start up disk that is for a different pack bell computer. Can I use this? Everytime I attepmt to run it the system is telling me there in no O.S.when I reboot.It will not let me install. It keeps saying I do not have room on drive “c” Any Suggestions?