qemu-img create -f qcow2 windows81.qcow2 40G
Look for the folder: viostor\w8.1\amd64 (for 64-bit) or x86 (for 32-bit). windows 81 qcow2 install
Once Windows 8.1 is running, you must install the remaining drivers for the network and system integration: Windows 8.1 support ended on January 10, 2023 qemu-img create -f qcow2 windows81