Where/how can I get all of NASA's astronomy pictures of the day?

I just found out that Windows 7 can automatically rotate your desktop wallpaper whenever you want it to.

I guess the rest is pretty straightforward.

I think this does exactly what you are looking for without having to download all the APODs:
APOD Wallpaper

I saw that before starting this thread, but [without being 100% sure] I don’t think it does exactly what I’m looking for. There is 15 years worth of PODs backlogged, and I don’t think this program will show them to me. I get the impression that it just posts the new one every day. I want to have all the PODs so I can cycle them every half-hour or so.

Maybe here? Astronomy Picture of the Day Archive 2015