Q: Bootcamp Causing MacOS crash?

I have severe issues on the on Mac Os side of things. This has happened post installing El Capitan. But that could just be my uneducated guess. What really has been happening is this; every night I log out of Mac OS and move to Bootcamp with Windows 10 to watch movies on MPC-HC with madVR. Once done watching I shut off and switch on the laptop the next morning. Now, couple of different things have happened at different instances. Once, on the opening screen with the apple, it took a long time for the laptop to read and then it shut off instead of moving on to the login screen. At other time, there was no apple partition to be discovered. In both instance, disk utility could not read the partition and I had to use Disk Warrior. Sometimes I get back to the OS without any harm done but at times the OS has been wiped clean of all files except OS files, like a clean re-install. This is when I use an existing Time-Machine backup to get my files back. This happened right now too and I am quite fed up. With this problem and Apple changing my damaged screen with a yellow tinted screen is really putting me off the brand that i have lived with for close to twenty years. Hope you guys can help me find a solution to this.