XP Network

On one of the XP pro systems I cant get it to accept the The client… or file and print sharing… in “This connection uses the folling items”. It holds TCP/IP and QoS Packet Scheduler but when you try to tick File sharing and Client for Microsoft and click OK it comes up with “Your current selection will also disable the following components: Client for Microsoft Networks File and Print Sharing for Microsoft Networks. Are you sure you want to disable these component(s)? YES NO ” Can someone help on this please. PS. Loop ping good and also pings other PC’s.