Media Failure and reboot messages shutting down on its own

Hello,


I have a Dell Inspiron 15R 5521 and recently the computer started shutting down after being in sleep mode for awhile. Sometimes when I restart it I get a black screen that says "media failure" a few times and a message about rebooting--that one I haven't seen in awhile so I can't recall exactly what it says. This started while I still had Windows 8 and has continued since installing and then reinstalling Windows 10. Sometimes when I restart I get a blue screen that says "Recovery. It looks like Windows didn't load correctly." Any ideas how to solve this problem? One time when I turned it back on my keyboard wouldn't work. That was alarming! Any help is appreciated! Thanks!