XP PRO workstation will disconnect from user or shared drives when left on overnight. Sometimes will also disconnect throughout the day. I have already replaced the computer, verified no problems on the port its plugged into on the cisco switch, tested the cable and unchecked allow nic to power off for power settings. The user is logging into the domain from the workstation. The domain resides on one WIndows 2003 file/domain server. The Server is all up to date with service packs. It's an HP ML350 g3 with 4.5 gigs of memory with about 80 users logging into the domain, but only about 20 percent of these users connect to there files on the server. Is there any windows problem i'm missing from the server? Do I have enough memory in the server?