How to Access USB Devices in Windows Virtual PC for Windows 7One of the key upgrades in Windows Virtual PC for Windows 7 is the new ability to access USB devices directly from a virtual machine. The ability to access USB device in Windows Virtual PC means that you can treat your virtual machines completely like a host machine. You can read and write to flash drives, access printers and scanners, and take full advantage of external hard drives. However, before you can access your USB devices within a virtual machine or Windows XP Mode, you need to establish a connection to the device within the virtual machine.