What distro and version of that distro are you using? Did you install gpg from the repository or elsewhere? What version of gpg are you running?

The OOM killer is particularly bad with ZFS since the kernel doesn’t by default (at least on Ubuntu 22.04 and Debian 12 where I use it) see the ZFS as cache and so thinks its out of memory when really ZFS just needs to free up some of its cache, which happens after the OOM killer has already killed my most important VM. So I’m left running swap to avoid the OOM killer going around causing chaos.

I think that also causes issues for roaming profiles and folder redirection. If roaming is turned on then everything in the %appdata%\roaming folder is synced to a server. %AppData%\Local is not. So if your app is using %AppData%\Roaming for temporary data then you are causing a whole bunch on unnecessary IO. Same for using Documents since that if often synced.

Can you run a live CD on the machine? You mentioned Memtest but I’m wondering if an Ubuntu one would work.

Absolutely!

Steam hardware survey but that will skew towards gamers. That said, it would be a good indicator on how compatible Wayland is.

It’s a gaming machine. I mainly use a gaming VM with GPU passthrough under Proxmox, but the anti-cheat is some games (Fortnite and The Finals) don’t allow you to run them in VMs. So I run those games in Windows directly under a standard user account as a compromise.

UEFI or legacy BIOS? I recently installed Windows 11 on a machine with Proxmox on NVME but installed Windows on a SATA SSD. Windows added its boot entry to the NVME SSD but did not get rid of the Proxmox boot entry.

I’ve definitely had the same issue as you on in the past on legacy BIOS and when I worked in a computer shop 2014-2015 we always removed any extra drives before installing Windows to avoid this issue (not like the other drives had an OS anyway).