BSOD on a random basis, sometimes can't even boot

Hard-drive tests are not always perfect, and most programs will most probably test using different methods, 59% doesn't sound good at all and seems to pointing towards a failing hard-drive.

For Crystal Disk Info:

1. Open Crystal Disk Info
2. Click Caution
3. Move All Slider To The Left
4. Click Apply
5. Post Screenshot

I would strongly suggest creating a backup of your personal data and files with:

• Backup User and System Files

Move the backup to an external media, such as a another computer, external hard-drive or a USB stick.

As regarding to backups.. I'm all good.
I'm using triple ongoing backups... so I'm not worried on backup issues.

Here is the 'after' screenshot..

Attachment 261992

It looks better, and how many passes did you run MemTest86+ for? Repost what the Sentinel program now reports also.