Forgot to add, I am trying to dualboot it with windows on the same disk(different partitions), do you think that could be in any way in interference?
I don't expect that that will interfere but I do know the Proxmox installer does not support it and will wipe the Windows from the drive, More than one unfortunate thread on this forum about losing data that way. Maybe try removing the current drive(s) and try installing Proxmox on a different drive (to prevent accidents and test whether it was interfering)?
Do you think using an earlier version of proxmox could ever work, and if so which ones possibly, or is that just a waste of time?
"ever work" for what? Proxmox installer never supported dual boot. You could try installing Debian with dual boot first and then Proxmox on top of it: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_install_proxmox_ve_on_debian . Make sure you have backups as it's real easy to wipe Windows or wipe Proxmox when you install or update one or the other.
I tried to install debian 12, to do what you said, and it too recieved the same error. Different disks, usb's and changed bios settings and everything else I can think of.
I did not look into your original issue yet. Looks like there is some incompatibility with your current system and Linux in general, maybe? That would be unexpected and I have no idea how to troubleshoot that. Maybe the very new GPU is a problem? Can you try booting with an older more supported by Linux GPU? Maybe look for other people that have problems booting Linux with Nvidia 50x0 GPUs?
