I 2nd the Get an SSD, you can use your old hard drive for storage unless it's failing, in that case check the warranty Asus may have run out but most manufactures have at least 3 year warranty. Back up your data NOW.
Blue Screen may or may not be caused by failing hard drive. One thing for sure if you haven't reinstalled your OS in 2 years a Clean install will probably solve your problems.
You can find on the hard drives manufacture web site will have a free tool to test your Hard Drive, you should do this right after you back up your DATA.
Hwifo64 will show you all the data on your hard drive Brand Name model etc. It will also show you what your RAM Timing and Voltages is Should be 1.5 V and timing CAS 11 , Also for installing a new SSD or Clean install check out this
thread Good Luck and come back if you need more advise.
If you want to try to solve you
BlueScreen problem
G752VY-DH72 Win 10 Pro
512 GB M.2 Samsung 960 Pro
1 TB Samsung 850 pro 2.5 format
980m GTX 4 GB
32GB DDR 4 Standard RAM
Z97 PRO WiFi I7 4790K
Windows 10 Pro
Z97 -A
Windows 10 Pro