What are you using (KVM, Proxmox, or VirtualBox)?
For Windows 7, ensure you use a driver version that still supports NT 6.1 (Version 0.1.173 or earlier is highly recommended, as newer versions dropped Windows 7 support).
Alternatives
When you deploy a Windows 7 VM for production, prioritize these recommendations: always use VirtIO drivers, set your disk cache to writeback , and stick to a cluster size of 128KB or 256KB with metadata preallocation for a well-balanced, high-performance system.
Use this command to create the perfect base image: windows 7qcow2 best
Run a tool like SDelete with the -z flag inside the VM to zero out free space.
Tests have shown that a Windows 7 installation on a QCOW2 image can take nearly three times longer compared to a direct hardware installation, a difference that underscores the need for proper tuning. In write-intensive operations, QCOW2 has been observed to be considerably slower than using a raw disk image or a host block device. For performance-critical applications, a raw disk image often provides a noticeable edge, especially in I/O-heavy tasks. What are you using (KVM, Proxmox, or VirtualBox)
It supports native, live snapshots, allowing you to save states before running risky software or updates.
Download SDelete from Microsoft Sysinternals. Open an elevated command prompt inside the virtual machine and run: sdelete64.exe -z c: Use code with caution. Use this command to create the perfect base
defrag C: /L /U /V