Hi I'm running vista 64, home premium and have recently purchased a WD 1TB network drive. Now everytime I go to restart, put my computer into sleep or hibernate mode it hangs at the shutdown screen in vista. Only when I disconnect the external HDD and turn it off does my computer go back to normal. I checked the removal policy from the HDD under the device manager and optimized for performance is checked. I can't get access to change it to optimize for quick removal. Does anyone know how to change the removal policy so it doesn't cause vista to hang? Or does anyone know what might be causing this?