I unplugged my HDD to put into a friends computer to transfer some files and when I unplugged it out of his PC and back into mine, the windows logo screen came up and the computer shut down. Then, I pressed the power button again and rebooted it and now I can't access certain folders and files like with pictures and music.I have tried replugging my hdd several times but noting. I can only access control panel by right clicking the windows logo (running on windows 8.1) and hitting programs and features then going back