How to Install Ubuntu 18.04 Alongside Windows 10

Booting Ubuntu Live

2. 2. Setting Up Ubuntu Live Boot

   First, you may need Disabling Secure Boot and Setting up Boot from CD/DVD on Windows 10.

   How to Start Up Windows 10 with Ubuntu CD/DVD/USB Live Media

   Win 10 Boot Setup

   Booting Windows 10 with Ubuntu Live

   So then Boot your PC with Ubuntu Live Media.