@off_grid_living (#g3th6hq) That’s an interesting observation, that the source image is even smaller! Your workflow seems overly complicated to me. Isn’t there a resize option in this image viewer? Maybe get yourself a proper image viewer. When I was on Windows decades ago I used Irfanview, not sure whether this still exists. As for dedicated image editing in a GUI, I can recommend GIMP. I reckon ImageMagick is availabe on Windows as well, you could easily automate resizing with it in a script if you have the courage to use the command line:
convert -resize 400x300 -strip -quality 50 ORIGINAL.JPG RESIZED.JPG is what I use.