SOURCE: benq 4300u driver for windows 7
http://www.benq.us/support/downloads/downloads.cfm?product=92&page=downloads&dtype=D
try install manually from control panel add hardware using xp drivers
SOURCE: Benq scanner type S2W 4300U does not have a driver with W Vista
scanner is not found! Please check if 1. Scanner power is on 2. Cable is firmly connected
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