Hi chriss- It does sound like a reinstalled OS would be needed, then run the Ultradock installer (with the UD connected) on that fresh system. The ethernet drivers are invisible and inserted into the System file (if I'm remembering correctly how it works) so a Clean System Install is the only way to clear possibly corrupted drivers... Good luck! David >So I think this is something in the OS....maybe I should install the >OS when the UD is connected? >chriss