No Man's Sky minimum requirements for Windows assume having at least Windows 7/8.1/10 ( versions) operating system. Your processor should be Intel Core i3 or a more powerful one. The minimum RAM requirement is 8 GB. As for a graphics card, it should be nVidia GTX 480, AMD Radeon 7870. You also have to have 10 GB free disk space to install the game.
No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe.