I am using a Win7 Professional Host, with Win7 guests.
Previously, I have been able to use USB devices (for embedded s/w dev) that the host OS knows nothing about, and have easily connected them to the guest OS's (where I would have the necessary drivers and other tools).
Now, the Host OS complains about not finding a driver, and the USB devices never make it through to the guest OS.
Any idea what has changed, or how to get back to the former behavior?