you could also go into the device mamngaer and see if you have any yellow exclamation marks. may tell you were you have an issue. I am assuming the e drive is your camarea? Or do you have a partition that is an e drive? the issue if the the camera is the e drive can be one of several things. The usb cable is messed up or your usb port is, the firmaware of the camera may be coruupt, or pehaps something else