Ubuntu (Xenial Xerus) 16.04
- Free (GPL)
The best free operating system out there Ubuntu is a free and open source operating system for your PC It is powered by Linux, whose robust technology operates millions of servers worldwide ...
- PROS: Completely free operating system, Very quick and easy to use, Easy Windows installer, Ubuntu One syncs with mobile devices
- CONS: Can be difficult to install external components, Tricky to get used to after using Windows