This method ensures a clean, secure, and customized image.
| Scenario | Why Qcow2 + Lite | |----------|------------------| | Reverse engineering sandbox | Snapshots before malware analysis. | | Legacy app testing | Runs on 1 GB RAM hosts. | | CI/CD Windows runner | Fast boot, small disk, easy reset via snapshot. | | Embedded / thin client | KVM on Intel NUC / old laptop. | | Remote dev environment | Qcow2 over NFS with backing files. | Windows 10 Lite Qcow2
When running a Lite OS, you don't want a heavy virtual disk format ruining the performance gains. Qcow2 (QEMU Copy-On-Write version 2) is the native format for QEMU and the preferred disk format for Proxmox VE. This method ensures a clean, secure, and customized image
Solution: Windows does not send TRIM commands to a Qcow2 disk by default. Run the following inside the VM as Administrator: Or enable the "discard" option in QEMU: -drive
defrag /L C:
Or enable the "discard" option in QEMU:
-drive file=win10lite.qcow2,format=qcow2,discard=unmap
Run as Administrator:
# Using Windows10Debloater (PowerShell)
Set-ExecutionPolicy Unrestricted -Scope Process
iex ((New-Object System.Net.WebClient).DownloadString('https://git.io/JJ8R4'))
Then remove Windows Store apps, Xbox, Edge (if desired), and disable background services.