I'm using an early version of Parallels installed when I purchased my Mac Book 2 years ago. I use Intuit Quicken software on a PC desk top and back up data to a Cruzer Flash drive. When I use the Quicken software on my virtual machine I attempt to restore using the updated data on the flash drive. Is recognizes the flash drive as inserted but I always get a message stating that the USB device I am trying to access is being used by another process and that I should terminate that process then reattempt. I am UNABLE to determine what, if any, process is using the USB device (Flash Drive) If anyone could tell me how to overcome this I would be very grateful.