Computer: Dell XPS 8500, OP: Win 7. When my computer is idol, I get the following message "There is no disk in the drive. Please insert a disk into drive\device\harddrive 4\DR4." Why am I getting this warning and how do I stop it? I assume it is because I see a number of (4) removable disk drives. They are a result of plugging in a thumb drive or passport and manually unplugging instead of right-click-eject. I assume the computer is still looking for them. So, how do I stop the warning and loose the removable devices? NO, I no longer have the thumb drives.