Question: I have a USB device (USB to RS-232) that works on some computers without drivers but not on others. This is a problem because I don't have the drivers disk for it nor any info on who made it. 

*Are there any tools that will tell me what kind of device it is or whatever info windows (and other OS's) pulls in when it's trying to set it up?*

Answer: 
A list of USB vendor and product IDs is available [here](http://www.linux-usb.org/usb.ids).

These programs can give you some or all of the information you need in order to try to track down a source for drivers:

* [USBDview](http://www.nirsoft.net/utils/usb_devices_view.html)
* [USBView](http://www.ftdichip.com/Resources/Utilities.htm)
* [SniffUSB](http://www.pcausa.com/Utilities/UsbSnoop/)
* [Bus Hound](http://www.perisoft.net/bushound/) - USB, SCSI, IDE, Firewire, etc.
I've had good luck with Everest

<http://www.softpedia.com/get/System/System-Info/Everest-Home-Edition.shtml>

It will give you all kinds of info about devices that are present without drivers.