You will need at least 600 MB of free disk space to install WAR7. To play WAR7 you will need a minimum CPU equivalent to an Intel Core 2 Duo U7600. The cheapest graphics card you can play it on is an NVIDIA GeForce GT 650M. WAR7 system requirements state that you will need at least 2 GB of RAM.
WAR7 will run on PC system with Vista/7/8/8.1/10 and upwards.