Windows VMs can be installed, but as usual with Windows, they lack many drivers, especially for the network to function. The appropriate drivers can be found here: DRIVER DOWNLOAD (Source: GitHub)
In the Windows VM, select: “Hardware” - “CD/DVD” and specify the ISO file. This makes it available under Windows as a CD drive These drivers were missing for me:
Steps 1 and 2 CANNOT be done with Device Manager, they must be done exactly as described! After that, all drivers were installed for me.
For this, the following must be installed:
qemu-guest-agent and spice-vdagent
Additionally, the kernel should be up to date.