Olex2 is a free program that contains everything you need to solve, refine and finish small-molecule crystal structures using an intuitive user interface. It is simple to use and there are plenty of Olex2 resources on the web. 

Dr. Ilia A. Guzei at University of Wisconsin has written some Notes on Olex2. It has a thorough Olex2 installation guide, which also includes the installation of SHELX and PLATON. 

Ilia Guzei’s Notes on OLEX2

Contact Chun Li if you have problem installing Olex2 on a Windows 10 computer. User manuals, cheat sheet, and tutorial videos can be found by searching on the internet.