Help! Errors errors everywhere!

Hi guys it has been a long time since I posted a thread here, anyways I justed wanted to ask for assistance.

Way back April 2016, I bought my very 1st 2nd hand computer and up until last week it was doing perfectly great. Now, My computer actually experienced a lot of error recently,

FIRST the error message for A disk read error occurred. Press Ctrl+Alt+Del was searching for a resolution online but none has given me resolution.

SECOND,
part 1:by tweaking here and there (a lot of process I followed online, totally forgot all of those process)
now, i was able to surpass the error but by this time when I open my PC it stucks on the boot menu. Every time a reset it.
part 2: I noticed that the hard disk was not recognized by the bios (ASROCK H61M-DGS). Went to the storage option I was able to change from ASHC (Not sure though) to EDI and I was able to pass the bios part.

THIRD after a pass the bios the system is asking me if I can run the system normally or launch a system repair with a black screen with white fonts. I tried to check both choices and it will go to a blue screen (BSOD)

need help badly, wanted to play dota 2 and paladdins for relaxing hehehe :P thanks a bunch for the help in advance.

A disk read error and it not being seen by BIOS is a fatal error it sound like you need a new disk backup now

I agree with Samuria. Boot with a Linux USB flash disk and backup your data to an external disk.

Boot with the Win 7 installation disk - repair - Cmd and type:
chkdsk c: /f
If it gives you bad sectors or bad blocks, your disk is dead and you need to replace it.
Buy a SSD. I have one of these:
PNY CS1311 2.5" 120GB SATA III TLC Internal Solid State Drive (SSD) SSD7CS1311-120-RB-Newegg.com
So far so good.

Thanks for the reply, I might think It is unstable.
I'm using my pc now, and I am shocked that It pass through.

but of course I will surely follow the recommendation guys.
THank you one again for you help!