Resolution being saved as 0x0

When I start my game if I have my resolution set to 640x480 (or the minimum possible I guess) and in fullscreen, the game never seems to start, sometimes I get a black screen or a white screen, after or even before the unity splash screen, and checking the registries of the resolution saved, it says 0x0

I think this might be related to Screen.resolutions (?) as is what I use to get the list to change it in-game

Any help you can give me is much appreciated, thanks in advance