I finally got the guest agent installed. I did all of these things; I don't know if all of them were required:
Proxmox: 5.4.13
virtio-win.iso: 1.173-7 (downloaded from
latest-virtio)
Guest: Windows 7 Professional SP 1 (Version 6.1.7601) 32-bit; not joined to any domain
Virtio Serial Drivers: Installed long ago during another attempt to get the guest agent working.
Guest Agent Installer: <virtio-win.iso>\guest-agent\qemu-ga-i386.msi
- Run through device manager (devmgmt.msc) on the guest and attempt to update the drivers for everything from the virtio-win drivers disk
- attempt install (fails)
- run the ".mof" cleanup as described by
slick
- reboot
- attempt install (fails)
- start the 'volume shadow copy service'
- attempt install (fails)
- disable Qemu Agent for the guest in 'Options' in Proxmox
- reboot
- attempt install (fails)
- uninstall Comodo endpoint security
- reboot
- Run 'services.exe' in the guest VM, start 'Volume Shadow Copy Service',
and set startup to 'Automatic'
- Install qemu-ga-i386.msi (SUCCESS)
- shut down the guest
- enable 'Guest Agent' in Proxmox Options for the guest
- start the guest
- Guest agent is recognized