Hi
USB drivers are part of the Microsoft Windows OS. So you cannot update and install this manually.
By the way: this unit seems to be an Toshiba Australian notebook model. I could find this here:
http://www.mytoshiba.com.au/support/computers/tablet/m11/ptme1u-03r034a1/download
But it seems that not all drivers have been released for Win 7 64bit.
But don’t worry… There is a Toshiba European driver page where you could download all Win 7 64bit drivers for the Tecra M11 PTME1E series…
This European series is a same like the Australian series PTME1U.
Regarding the missing drivers:
The internal webcam is connected to the USB controller and I think you should install also the webcam software/driver in order to get the unknown devices disappearing.