How to make a server out of an old comp?

Trying to make a minecraft server or bukit server?

• when i try to start up a server it always says this --> [WARNING] **** FAILED TO BIND TO PORT! [WARNING] The exception was: java.net.BindException: Cannot assign requested address: JVM_Bind [WARNING] Perhaps a server is already running on that port? but i have no other server's running has any one had the same problem or know what how to fix this i have made a server befor but idk why it's doing this i have done all the port for wording right i know have i have done this lot's of time be for but now just out of know where it dose this any one know whats wrong or how to fix this ? i have tryed to make both bukit server and a normel minecraft server and they both end up saying that.

• Answer:

  The port might be in use by another program, or you may have a firewall up, try turning your firewalls off, and try opening task manager to make sure there are no other minecraft servers running some how in the background. if it still doesnt work, just try rebooting the comp.