Question Blue screen at each boot after successfuly upgrading computer

Dec 29, 2020
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Hi everyone,
I have a problem with bluescreen at every boot

I changed my computer not long ago and just kept the hard drive, the power supply (coolermaster RS600 acab D3) and the graphic card (Nvidia Geforce GTX 770) because everything else was incompatible. After mounting everything, the PC was working fine.

I spent a few days solving software problems (w10 license).
After 3 days I decided to install the drivers of the motherboard's website (just in case) and I rebooted several times in the process, the PC worked fine.


The next day, I start up and after 2min the computer suddenly shuts down and restarts. But it boots on blue screens and reboots itself in a loop. The errors were different but after several reboot it always reboots on "kernel security check failure".

I tried to boot on a w10 live usb, I have the same error. I tried to reset the bios ,same thing. I tried to keep one or the other of the two ram modules, same. I reinstalled windows completely multiple times but also the same.

Also, the startup screen is a bit different. I have during 2 or 3 seconds a flashing underscore on a black background like ms-dos but without any text.
Meanwhile, there is no problem once back on the old pc.

So I imagine it must be a hardware problem.

Do you have any ideas how can I know which component is responsible to send it back ?
I think it could be cpu or motherboard as ram doesn't change anything but I don't see any way to test it.

My config :
Motherboard : msi x470 gaming plus max
CPU: AMD ryzen 7 3700x
Ram: PNY XLR8 8*2 GB 3200MHz Cl 16
Graphics card: Geforce GTX 770
 
yes I choosed the reinstall option in windows and selected the option where all datas are removed
That is not a full "reinstall".

This is what I mean:

Deleting ALL existing partitions and starting with an actual blank drive.
 
Well, thats the first problem that needs to be fixed.

Ok I have tried that but after deleting windows partitions I had an error saying that windows can't be installed on gpt partitions so I tried to disable csm. Now I have blackscreens even after clearing cmos.

Nevermind, someone gave me a bootable W7 usb and I try booting it on the new pc as the hard drive was at least cleared. W7 booted well, loading files step works but pc restarts as soon as w7 begin starting step.

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this works

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This short step works too

4F0iB35.jpeg

Then it reboots at the moment the bar starts loading

Does this can give hints about what is not working ?