QEMU

Install Ubuntu 20.04 LTS on QEMU for Windows

List available accelerators

qemu-system-x86_64 -accel help
Accelerators supported in QEMU binary:
hax
whpx
tcg

Boot test

https://help.ubuntu.com/lts/installation-guide/amd64/ch03s05.html

cd ~\Downloads

# with Tiny Code Generator - very slow
qemu-system-x86_64 -cdrom ubuntu-20.04-desktop-amd64.iso -boot once=d -m 1G

# with HAX - won't work
qemu-system-x86_64 -accel hax -cdrom ubuntu-20.04-desktop-amd64.iso -boot once=d -m 1G
Failed to open the HAX device!
Open HAX device failed
Failed to get Hax capability:6u
No accelerator found.

# with Windows Hypervisor Platform - good!
qemu-system-x86_64 -accel whpx -cdrom ubuntu-20.04-desktop-amd64.iso -boot once=d -m 1G
Windows Hypervisor Platform accelerator is operational

# with Tiny Code Generator (multithread) - 
qemu-system-x86_64 -accel tcg,thread=multi -cdrom ubuntu-20.04-desktop-amd64.iso -boot once=d -m 1G

"C:\Program Files\qemu-2.1.0\qemu-system-x86_64.exe"
-drive "file=C:\disk1.vmdk,index=0,media=disk"
-drive "file=C:\disk2.vmdk,index=1,media=disk"
-smp 4
-net nic,vlan=0,macaddr=52-54-00-B3-47-55,model=rtl8139
-net user,hostfwd=tcp::9000-:80
-m 1024