I'd try downloading the latest drivers from prolific's website.
I brought this GPS receiver couple week ago for my carpc. right when i received it, i test it and everything works fine. however now it isn't. After i installed the logictech use mouse (G5), the receiver never worked since than. i tried to uninstall all logitech programs, and reinstall bu-353 driver, so far nothing works. everytime in plug the receiver into the usb port, "it'll sad one of the usb devices attached tothis computer has malfunctioned, and windows doesnot recognize it"
doesn't know know how to fix this problem?
i installed the new driver and it still doesn't work. i tried on 2 computer both are giving me the same thing. Unknown divice.
Hmm.. you don't have this plugged into a usb hub or anything like that do you?
Have you tried it on a different computer yet?
I think it's dead. It's a pretty reliable unit, I have the same one and it's worked flawlessly out of the box.
I'd say send it back man. That sucks.
I'd try it on a different computer first. Have you tried uninstalling and re-installing your usb root hubs in the device manager? If it does the exact same thing on another pc I'd definitely say send it back but I wouldn't call it defective quite yet.