Official Microsoft Edge Developer VMsMicrosoft provides free 90-day evaluation virtual machines specifically for developers. While these are often provided as .OVA or .VHDX files, they are the most secure "fixed" base. You can easily convert these to Qcow2 using the qemu-img tool.
This command ensures the format is consistent and ready for Proxmox or QEMU. Common Fixes for Windows 10 Qcow2 Performance
Snapshots: Take a snapshot immediately after the first successful boot.
Use host CPU Passthrough: Instead of a generic "kvm64" CPU, pass the "host" CPU model to the VM so Windows 10 can use all modern instruction sets.
Discard/Trim Support: Ensure "Discard" is enabled on the drive settings to allow the Qcow2 file to shrink when files are deleted inside the VM. Best Practices for Stability To keep your Windows 10 Qcow2 download running smoothly: