Activate Windows Subsystem for Linux.
Run with Admin Rights
Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux
Enable Developer Mode:
Settings > Update & Security > For Developers and select Developer mode.
Download Ubuntu with:
Invoke-WebRequest -Uri https://aka.ms/wsl-ubuntu-1604 -OutFile Ubuntu.appx -UseBasicParsing
Rename Ubuntu.appx to Ubuntu.appx.zip, extract and run the installation ubuntu1604.exe
.
More details in Manually download Windows Subsystem for Linux distro packages