Yep sure sounds like a dead or dyeing hard drive. you could try using the manufactures diagnose tool. You'll find this on the website under the support tab.
hopefully you have everything back up so all you'll have to do is restore once you replace the bad hard drive.
You could pull it and put it in an adapter or ext hard drive case and try it on another computer at least to recover your data.
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