Functions of Port 445?

Other than file sharing in a Kerberos environment, what functions are
performed by port 445? On a test machine, I uinstalled the File and Print
item for the network adapter, which uinstalls the Server service. Even
after rebooting in that condition, port 445 is listening for both UDP and
TCP, as shown by NETSTAT -AN. So you would have to conclude that there are
other functions being performed by 445 other than file sharing.