You should actually get either the 5.0-rc builds or one of the latest dev builds, as 4.0.2 is old and buggy. And 32 bit Dolphin has been discontinued, read about why here: https://dolphin-emu.org/blog/2014/05/19/obituary-32bit/ So always use 64 bit of your computer can handle it. Also, Dolphin only needs a computer to have 2 GB of RAM.
There's no such thing as a Dolphin OS
There's no such thing as a Dolphin OS

