Im using osx, and got a windows xp running in my parallels. When I plugin the usb reciever for my "Logitech MX610 Laser Cordless Mouse", parallels pop up a question: "You are trying to connect USB HUD device to the virtual machine....". While displaying this popup, parallels uses more than 100% cpu. The cpu usage drops after clicking the yes or no button.. But if I leave the popup unanswered, parallels continues to use >100% cpu.