I'm not sure whether it's due to mining with your laptop coz it worked good for 4 days. You told it's a one year old laptop. Modern laptops are capable to turn itself off if the heat is about to damage the physical components. You don't have to worry about content loss if you've to do a system restore or even if you're about to install fresh OS, you can possibly retain the contents in the hard drive including the contents of C drive.

Note: I said "retain" (You can install new OS without deleting any files), not "recover" (recovering deleted files).