This runs on my 16 year old junk laptop running windows XP. Extremely light on your PC's resources.
If you're going for Elona+ Custom-GX, you'll need Elona+ 2.06fix regular with it (so download this and custom GX if you haven't already).
Main thing I'd suggest if your laptop doesn't have one is a dedicated keypad. All (non mobile) versions of Elona make large use of it for selecting various targets, including yourself if desired or needed.