ReactOS in 5 min "Install and connect to Internet"
How to install and start testing ReacOS in 5 min?
First links and some info.
1) What is ReactOS? - https://www.reactos.org/about-reactos
2) Download ReactOS - https://www.reactos.org/download (you will need Installation CD zip archive with ISO inside.
3) VMWare (or you can install it on PC,Laptop directly or another Virtual machine like Oracle VM VirtualBox (free) )
Installing process is very easy, you will have to do some clicks and press Enter few times :)