I am systems manager over a small PD network, one of the computers is running windows xp and has ran fine on the network untill a few weeks ago. When starting the computer up it ask for the user name and password and when you enter it, it sits for about a minute then says cannot log into network and will not bring up the computer. You can unplug the network cable and after a few attempts can log in, the reconnect the network cable and access the network fine. Any help appreciated. Pulling my hair out. Chief's computer