@Statitica Not having stornvme\StartOverride is expected on systems that use NVMe controllers to boot (e.g. XCP-ng Windows templates). Can your imported VM boot on the correct Windows template once you have made sure stornvme\StartOverride is not present? Once it boots with the correct template and NVMe controller then let's see what the performances are.

I'm taking another look and it looks like the tools may be under another name... xen-tools I may be going blind at this point if I've missed it this many times.

@kulmacet Can you recreate this with other VMs, or just this specific oracle linux VM? I would spin up a new debian VM for example and shut this problematic VM off, and see if the issue happens with this VM as well. Outside of that, it's really looking like a hardware issue. Also, double check the ILO and BIOS firmware are at the latest. I can almost guarantee it shipped with ancient versions, and many issues like this have been patched relatively recently.