We have a school lab with identical XP Pro pc's all logging in with the same user name and password. They are in rows of 4 and the machine on the end of the row controls the other 3 with a network Ncard connecting to an Ncomputing x300 box for power, each pc has its monitor, mouse, and keyboard plugged into its own x300 box. Randomly the mouse will lose connection and not work again on 1 machine and the whole row has to be rebooted by rebooting the controlling computer on the end, which then fixes the problem. Usually the keyboard and monitor will still respond , while the mouse does not. Unplugging and reseating the mouse cable to the x300 box does not usually fix it, nor does reseating the network cable in the specific x 300 box. This happens randomly to different rows at different times and there is no discernible pattern of any certain application being open at the time or any errors. The whole row then has to be rebooted, causing loss of work and down time. Has anyone seen this before or had any luck fixing this issue. We have tried both usb and ps2 mice with similar results and often times a machine will be rebooted to fix it and not lock up the mouse again and work fine for days.