No you can’t. The NAS is like a tiny computer with a big disk that shares the big disk on the network. The Operating System of the NAS is a Linux variant, customized by WD to make it customer friendly (somewhat).You cannot install this type of software for Windows or Mac platforms on the NAS. Because of the hardware limitiations, you can barely install any Linux programs either, although a bunch of Linux enthusiasts here are trying to make this work.
You can store the installers (like any file) on the NAS.
A typical consumer would store backups on the NAS, and their media (photos, music, videos) so that this content can be accessed by players inside and outside the house.