10.qcow2 — Windows

Insane Speed on Modern Hardware: Users running Windows 10 .qcow2 images on Apple Silicon (M1/M2/M3) via UTM report that the experience is "insanely fast" compared to traditional emulators.

QCOW2 file grows uncontrollably

• Cause: Windows writes logs, caches, and restore points.
• Fix: Disable System Restore, limit Windows Event Log size, and run TRIM weekly. On host, run qemu-img map Windows10.qcow2 to see allocated clusters.

Create a new disk image:

• -f qcow2 specifies format
• 64G allocates max size (actual file grows as needed)

End of Life: Microsoft officially ended support for Windows 10 on October 14, 2025. While it remains a stable and familiar environment, it will no longer receive critical security updates. Windows 10.qcow2

in your QEMU settings. This tells the host to reclaim space when you delete files inside Windows. 3. Managing Image Size One downside of Insane Speed on Modern Hardware : Users running Windows 10