Hi bwv848, thanks for replying!
I uninstalled f.lux as you asked. (Edit: I hope f.lux isn't the cause of my problem, I don't think I will survive without it for too long...)
I already have the latest BIOS version for my motherboard (I updated the BIOS just before I formatted my Windows).
I removed my graphics drivers (using DDU) and installed the recommended drivers by Gigabye using this link: http://download.gigabyte.eu/FileList/Driver/384.76-desktop-win10-64bit-international-whql.exe (the link you gave me wasn't for windows 10).
(Yes, I only checked the graphics driver and PhysX, and checked "Perform a clean installation").
After installing the driver, windows tried to update NVIDIA-something and failed (Code: 0x8024a105). But I think (and hope) it isn't a major issue, beacuse a little bit after that, windows update said my device is up to date (It also says that, after pressing the "check for updates" button multiple times).
Edit: Looking at "programs and features", I found that the nvidia driver got updated to 388.13, and Nvidia HD audio and 3D vision was installed (This is probably beacuse windows update... How do I stop it from happening?)
I have yet to face any freezes or crashes, but the real test will be when I play some games and see if anything wrong happens (I will report back if the issues are still present).
Edit: (I haven't tried any games, but) this morning I saw the notifiaction "Display driver failed to start" (Like this, but inside the notification panel)
In the first post I forgot to detail the "freezes" I experienced. My best try at explaining it to you is this:
It feels like the whole system have massive "FPS drops", and a few seconds later the screen just gets stuck on whatever I am currently doing (and windows won't open the Ctrl + Alt + Del menu).
Once, when I played CS:GO with my friends (with Discord), the "freeze"-thingy happned (the screen froze on some image) but I could still move in-game and hear the game running like normal, and I could still talk with my friends on Discord. (This incident might direct us to some display/graphics issue with my PC).
I completed the RAM diagnostics (I think it wen't well) and attached the report to this reply.
I will run the HDD diagnostics as soon as I can.
Edit: I'm reading the HDD Diagnostics Procedure (I have just a HDD and a UEFI based system), do I really have to run the test 3 times?
BTW, I already did the test on windows 2 weeks ago, this is the log file named "Z1D6NLCE.log":
--------------- SeaTools for Windows v188.8.131.52 ---------------
Model Number: ST1000DM003-1CH162
Serial Number: Z1D6NLCE
Firmware Revision: CC47
SMART - Started 22/11/2017 20:35:04
SMART - Pass 22/11/2017 20:35:09
Short DST - Started 22/11/2017 20:36:06
Short DST - Pass 22/11/2017 20:37:08
Long Generic - Started 23/11/2017 16:30:03
Long Generic - Pass 23/11/2017 18:21:53
Edited by itay347, 08 December 2017 - 12:56 AM.