I would like to install windows 10 ltsc iot inside qemu/kvm using virt-manager. My question is will this be completely isolated from the host os (linux mint 22.3 cinnamon)?
I am used to running virtual machines on windows 10 using virtualbox. I just wanted to confirm that this setup should be good before going ahead. I intend to run only open source software on the linux install and this is a closed source / hostile / untrustworthy OS. I wanted to make sure it is fully isolated like I am used to with virtualbox.
Thank you.


Not sure what sort of isolation you’re expecting but yes, QEMU + virt-manager will be a very similar experience to using virtualbox. Both offer the same sort of isolation so I don’t think you’d run into any surprises.
In both managers the VM does usually have internet access by default via NAT switch on the host system but you could re-configure it to bridge networking if you wanted. You could probably get rid of the NIC entirely if you don’t want it to have network access (haven’t personally needed to do that but it should be doable).
You do need to do some extra configuration if you need to share files between the Linux host and the Windows VM but I suspect you don’t want to do that if you’re looking for isolation.