If you do not trust pre-built images, the best approach is to download the official Windows 10 ISO from Microsoft and convert it yourself. How to Convert a Windows 10 ISO to QCOW2
| Your situation | Best action | |----------------|--------------| | Quick test, don’t care about latest updates | Download Cloudbase QCOW2 | | Production VM, need security patches | Build your own from ISO + Windows Update | | Limited bandwidth | Download pre-built once, then update inside VM |