I am trying to install a Promethean interative whiteboard with a serial connection to a Asus Vintage PE-1 desktop running XP. Downloaded latest drivers and installed. Device appears in system tray, all appears normal but board does not respond.
Drivers are listed in Add/Remove programs, com port says that it is connected. Took a look in Device manager and under mice etc board is listed as unknown device, code 28 drivers not installed

.
Removed drivers in add/remove, scanned registry for anything left behind and tried again with same result.
Installed drivers on a laptop and it worked first time.
Can anyone help?