W11 VM - Change / Update processor type


Well-Known Member
Aug 1, 2017
Oregon, USA
PVE 8.0.4 hosting a W11vm that working just fine on a x86-64-v2-AES processor type.
However, I would like to change the processor type to host or at least x86-64 v4 for the improved instruction set.
Just changing the processor causes the W11 VM to bluescreen or not even boot.

Has anyone done this after the W11 VM is setup?
I suspect there needs to be changes to UEFI and TP stuff, but this is where I'm fuzzy.
Any guidance or link to someone who's done this would be great.

Here's my config for the VM.
agent: 1
bios: ovmf
boot: order=ide0;ide2
cores: 16
cpu: x86-64-v2-AES
efidisk0: local-lvm:vm-106-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
ide0: BigStor:vm-106-disk-0,cache=writeback,discard=on,size=201252M
ide2: local:iso/virtio-win-0.1.229.iso,media=cdrom,size=522284K
machine: pc-q35-8.0
memory: 32768
meta: creation-qemu=8.0.2,ctime=1691000625
name: W11-1
net0: e1000=52:B2:18:FF:2D:72,bridge=vmbr0,firewall=1
numa: 0
ostype: win11
scsihw: virtio-scsi-single
smbios1: uuid=cde2f3de-3c94-469c-84f0-8c2b5faf8f48
sockets: 1
tpmstate0: local-lvm:vm-106-disk-1,size=4M,version=v2.0
vga: memory=512
vmgenid: 56b46dcb-9549-429d-a58c-7a9ce82bb00c
Windows is notoriously sensitive to (virtual) hardware changes. Best to install it with the desired configuration from the start.


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