Whenever I plug in a Honeywell 3800g scanner into my Windows XP professional sp3 computer, the pop up "Windows detected a new device - composite USB device' appears in the lower right, and within seconds of that the computer either freezes or blue screens, with this error:

IRQL_NOT_LESS_OR_EQUAL

the stop error is:
0X0A (0X28, 0X2, 0X0, 0X805239FD)

I have tried system restore, last known good, installing the drivers first, other ports, the same scanner from a different computer (with the same results), connecting a phone to the computer via usb (with no problems)....I am at a loss. Not a lot of Google information.

Have you gone to the honeywell web site support pages for help with this? They may have newer drivers. It is also possible that the systems you are trying to use it on need updated BIOS/Flash code.

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