Error starting VM windows10

Derek DiCamillo

New Member
Feb 19, 2019
Tried setting up a Windows 10 VM and continue to get this error.
Keyboard layout: default
memory 4.25 GiB
Processors 4 (2 sockets, 2 cores)
display: default
cd/dvd :local:iso/windows.iso,media=cdrom,size4050240K
cd/dvd: local:iso/virtio-win-0.1.141.iso,media:cdrom,size209208k
hardisk(virtio0): local-lvm:vm101-disk-0, size 62gb
network device (net0): virtio=02:12:31:20:43:19, bridge-cmbr0

Proxmox is 5.3-9 on a dell xps.
I have a home assistant vm running fine on it.

kvm: error: failed to set MSR 0x40000090 to 0x10000
kvm: /home/builder/source/qemu.tmp/target/i386/kvm.c:1910: kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.
TASK ERROR: start failed: command '/usr/bin/kvm -id 101 -name windows10 -chardev 'socket,id=qmp,path=/var/run/qemu-server/101.qmp,server,nowait' -mon 'chardev=qmp,mode=control' -chardev 'socket,id=qmp-event,path=/var/run/qmeventd.sock,reconnect=5' -mon 'chardev=qmp-event,mode=control' -pidfile /var/run/qemu-server/ -daemonize -smbios 'type=1,uuid=c73feb9a-5870-4f5b-b9dd-8ffc32055980' -smp '4,sockets=2,cores=2,maxcpus=4' -nodefaults -boot 'menu=on,strict=on,reboot-timeout=1000,splash=/usr/share/qemu-server/bootsplash.jpg' -vnc unix:/var/run/qemu-server/101.vnc,x509,password -no-hpet -cpu 'kvm64,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,hv_spinlocks=0x1fff,hv_vapic,hv_time,hv_reset,hv_vpindex,hv_runtime,hv_relaxed,hv_synic,hv_stimer,enforce' -m 4352 -device 'pci-bridge,id=pci.1,chassis_nr=1,bus=pci.0,addr=0x1e' -device 'pci-bridge,id=pci.2,chassis_nr=2,bus=pci.0,addr=0x1f' -device 'vmgenid,guid=79849c74-b3b0-49a5-a434-2d6a6436924e' -device 'piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2' -device 'usb-tablet,id=tablet,bus=uhci.0,port=1' -device 'VGA,id=vga,bus=pci.0,addr=0x2' -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3' -iscsi '' -drive 'file=/var/lib/vz/template/iso/virtio-win-0.1.141.iso,if=none,id=drive-ide0,media=cdrom,aio=threads' -device 'ide-cd,bus=ide.0,unit=0,drive=drive-ide0,id=ide0,bootindex=200' -drive 'file=/var/lib/vz/template/iso/Windows.iso,if=none,id=drive-ide2,media=cdrom,aio=threads' -device 'ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=201' -drive 'file=/dev/pve/vm-101-disk-0,if=none,id=drive-virtio0,cache=writeback,format=raw,aio=threads,detect-zeroes=on' -device 'virtio-blk-pci,drive=drive-virtio0,id=virtio0,bus=pci.0,addr=0xa,bootindex=100' -netdev 'type=tap,id=net0,ifname=tap101i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=02:12:31:30:43:19,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' -rtc 'driftfix=slew,base=localtime' -machine 'type=pc' -global 'kvm-pit.lost_tick_policy=discard'' failed: exit code 1
So it fails when I choose operating system type windows. should I be choosing linux? this doesn't make sense followed 3 different guides and failed everytime.
Please post the full config.

> qm config VMID

Here is mine, showing the recommended settings and virtio-iso for win10/win2016/win2019:

qm config 150

bootdisk: scsi0
cores: 2
ide0: iso-templates:iso/virtio-win-0.1.164.iso,media=cdrom,size=367806K
ide2: iso-templates:iso/Win10_1809.iso,media=cdrom
memory: 2048
name: win10
net0: virtio=6E:4D:86:55:23:48,bridge=vmbr0
numa: 0
ostype: win10
scsi0: localdisk:150/vm-150-disk-0.qcow2,size=32G
scsihw: virtio-scsi-pci
smbios1: uuid=0819a134-eb19-42f1-a502-69f0b6b54104
sockets: 2
vmgenid: 980283bb-838c-4cd0-80da-a33a45260437
Last edited:
Thank you. Here is my config The only difference I am seeing is the OS Type. Mine says win10?

root@pve:~# qm config 101
bootdisk: scsi0
cores: 2
ide2: local:iso/Windows.iso,
memory: 3360
net0: virtio=AE:82:D2:EC:35:01,
numa: 0
ostype: win10
scsi0: local-lvm:vm-101-disk-0,
scsihw: virtio-scsi-pci
smbios1: uuid=cb224e37-0475-483d-9cbf-f46dac8ab1aa
sockets: 2
vmgenid: e24fa74c-ea06-4010-ab6c-e0d8722fa200
Thank you. Here is my config The only difference I am seeing is the OS Type. Mine says win10?

Sorry, my fault. win10 is the right setting so your config is ok and should work (I corrected my post above)

Which physical CPU do you have in your XPS?
Its a dell xps 8300 running an Intel i7-2600. I have gotten it working using Linux as the OS type. Will this affect performance?


The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!