Medion PC stuck on BIOS

Hello.
Since you are in the BIOS, look for a way to load the default values and exit, if necessary, by pressing the F10 key and then Enter.

Bonsoir, merci, ça a été fait, mais il revient toujours sur le BIOS.

Yes, but I can't scroll down the arrow to select the disk; I can only click on SATA mode and it offers me either IDE mode or AHCI mode.

<translation>Good evening, I did that but I'm still having the same issue with the boot configuration priority; it shows me UEFI:IPv6 Realtek PCIe or the same thing in IPv4.</translation>

good evening yes I remade it and nothing works still the same problem

Well, if you have touched the BIOS, you may have mistakenly set either "IDE mode" or "AHCI".
It should normally be AHCI, but I advise you to try one then the other, restarting each time.

Maybe your hard drive is also defective.

Or there is a problem with your Windows, or a virus.

To attempt repairs, you need a Windows 8 disk or download something to make a recovery USB drive (or create it from a friend's Windows 8) in order to repair Windows.
https://support.microsoft.com/fr-fr/windows/cr%C3%A9er-un-lecteur-de-r%C3%A9cup%C3%A9ration-usb-460091d5-1e8f-cb33-2d17-8fdef77412d5

Otherwise, you need to make a live USB of Linux, which would allow you to test the hard drive, back up data, and if the hard drive is defective, replace it and reinstall Windows 8.
https://doc.ubuntu-fr.org/live_usb#creation_d_un_live-usb_depuis_windows

Reinstalling Windows 8:
https://www.commentcamarche.net/faq/35750-reinstaller-windows-tous-systemes-toutes-marques

But we're not there yet.
Good luck!

Yes for the peripherals and no for the hard drive, it is in 2nd position because I can't get it to switch to 1st.

thing that I have already done to relieve its charge but nothing works

I think I've found the reason why it doesn't work; the CPU fan isn't turning, so I suppose my CPU has given up. Thanks anyway for your help.

Good evening.
I don’t think it’s the processor.
Because in my opinion, if it were the processor, you wouldn’t have any display and wouldn’t be able to enter the BIOS.
I would start by looking at the hard drive.

A damaged hard drive can prevent the PC from booting and loop back to the BIOS. I saw that not long ago, for the first time, on a laptop.

So, I would try like I suggested, to boot this PC from a USB stick with Linux, for example, as I mentioned earlier.

If it boots from the live Linux USB stick, the PC works, and the hard drive needs to be replaced.

Thank you all, it was just the disk that needed to be reformatted to GPT.

Okay received, I will do that.