If you absolutely must download a pre-built image (to save the installation time), only use trusted developer sources.

Authorized users can access Enterprise editions or Insider Preview builds via their respective portals. How to Create a Windows 10 QCOW2 File

Once Quickemu is installed, downloading and configuring a Windows 10 VM is as simple as two commands:

| Feature | ISO Installation | QCOW2 File | |---------|----------------|-------------| | Time to first boot | 20–40 minutes | 1–2 minutes | | Pre-installed VirtIO drivers | ❌ No | ✅ Yes (often) | | Snapshot support | ❌ No | ✅ Yes | | Dynamic disk sizing | ❌ No | ✅ Yes |

If you already have an older QCOW2 file, you don’t need to re-download everything. Two ways: