Hi. My desktop was working fine until today when I had connected my external 120G usb drive. Before even if the usb drive was connected reboot was smooth but now I noticed that during boot up my screen stays black and stays there and it won't even reach safe mode when my usb external drive is connected. I have to press reset to re-start the pc. if i disconnect the external usb drive the pc boots up fine. what could be wrong? :dead: