Running Windows (Server or Desktop) in PVE is more involved than a simple Linux machine. Initial and post-VM setup must meet some specific conditions.
All VM configuration tabs can be configured like any other VM, with the exception of the three below.
On the OS tab:
On the System tab:
On the Disks tab:
Work through the installer like normal. Once you get to the disk selection page, click the “Hardware not showing up? Load driver to access your hardware” button.
Browse the virtio-win drive, select your architecture and version of Windows. Select the driver that shows up and Install. The virtual disk should now show up as an installation candidate.
Run the QEMU Agent installer to install all relevant drivers and agent software. Located in the root of the virtIO ISO (virtio-win-gt-x64
)