Hi RKM. Not quite sure. It was a process of elimination.
We, uninstalled scanserver and reinstalled.
we tried swapping all usb items, even tried a new mouse and keyboard.
we installed an extra USB board to the Mother board and nothing worked. (but the IT tech only tried one slot). The IT tech gave up and went home and I played with swapping the mill and scanner cords and
the scanner just started working. It came to life in the new usb board we added, but only in the 2nd slot of 4, It was a very tiring experience to say the least.
The board we added was a PCI to USB 2.0. 4x ports card.
I'm sorry I cannot add anything precise about what I did, it just happened and it seems to be stable after many reboots touching much wood along the way.