Great for 2013-2015 era apps, but lacks modern driver support. OS Stability ⭐⭐⭐⭐ Stable, but lacks current security patches. No Re-partitioning Needed: You can run it on top of Windows 10/11. Rapid Deployment: Ideal for developers needing to test on 8.1 instantly. Easy Backup: The entire OS is a single file you can copy/paste. EoL (End of Life):

If you have a physical machine running Windows 8.1, you can turn it into a VHD using the Disk2vhd tool [5.6].

: Right-click the unallocated space > New Simple Volume and follow the wizard to assign a drive letter [5.1, 5.3]. Method 2: Convert Existing OS (Physical to Virtual)