This was a new issue which we came across while creating a Wimdows OS on KVM platform on Virtualizor

After several tries of creatng a VPS, We were able to make headway on this.

1. Login to Virtualizor Panel
2. Virtual Servers >> Create VPS
3. After adding hostname bandwidth and disk space details,

Scroll to bottom to find option Advanced Options

Here you will find option Enable virtio which is already check marked

Uncheck the Enable virtio option and save

You should be able to see disk space now while creating Windows VPS

Also in network settings select Virtual Network Interface Type select Realteck

This will make network start after the VPS in installed