cached USB device descriptors

> Hi,
>
> We manafacture a dedicated piece of hardware and each piece of hardware has
> a unique USB string descriptor. This is the way that we designed the product
> and useful for us to have. However, for internal testing, each time we
> connect the USB device to a windows machine, it finds the new device and
> requests that the driver is re-installed. We have noticed that the more
> machines that the windows device recognises, the longer it takes to be able
> to recognice a new device. Presumably it's searching through it's list of
> known USB devices, which is growing larger and larger and larger....
>
> This problem has only really shown itself on the windows 2000 machine that
> we have. Sorry if the post was inappropriate.
>
> Does anyone have any suggestions for working around this problem? Is there a
> way to delete the list of "known USB devices" that the OS knows about?
>
> I've searched the registry for this sort of information, but it doesn't seem
> to be stored there.
>
> Any help is appreciated,
> Brett.
>