So, I bought a Benq 5000 scanner and it's perfect but there is something the worries me - it couldn't be turned off. It connects to the PC through USB port, first I though to leave it connected like my other peripherals, but it's lamp doesn't turn off - it just remains glowing non-stop. The manual says that it should revert to power saving mode when not used, but it looks like that it turns off only when I disconnect it from the computer (or the computer is off). Actually it turned off automatically one time, and there it was connected and the computer was on, but since then it didn't again. I forgot to mention that it doesn't have turn off switch. So what to do? Is there some kind of program that disables some of the usb ports (but only those I selected, my mouse is USB) or something, or I'll have to disconnect it every time I won't use it to the end of it's live?