How do I open and start QEMU at Genymotion?
QEMU requires Hyper-V to be enabled first; on Windows Pro/Enterprise it can be turned on in “Turn Windows Features on or off,” while Windows Home does not include Hyper-V by default and VirtualBox is usually recommended instead.
1. In Windows Search, open “Turn Windows Features on or off”
2. Check Hyper-V Management Tools and Hyper-V Platform
3. Restart the computer
4. If a firewall prompt appears on first launch, allow qemu.exe to access the network
Reference: “Unable to start virtual device” (QEMU - Windows)