Twice now, I've plugged in devices which the manufacturer claims require no drivers, only to have Windows tell me that the device driver was not successfully installed. I've managed to get the devices running on other computers without drivers, including a computer running exactly the same system.
My machine is Win7 32bit, and the devices are a Sabrent floppy disk drive and a bar code scanner of unknown pedigree, but I suspect it's a more general issue.
How can I get around this problem?