all the 3 floor B computers use win xp professional and the floor A computer uses win xp home. I tried to find the uplink port on the switch but its not labeled. I don't have the manual for the switch since the company that provided me the system didnt leave the manual or box. And I couldn't find the manual at the companys website or google. The switch is "lanready model es-808D". The ports on the switch are labeled 1-8 but nowhere does it say uplink.