Now I’m nowhere near knowledgeable enough to give you accurate information on this but I always took it as the regular version being for 64-bit operating systems and the one with the 32 at the end being for 32-bit operating systems. I could be wrong on this but fairly certain this is what they’re for. If you don’t know which one you have then you most likely have a 64-bit OS so I’d start there. If that doesn’t work then try the 32 one and if that still doesn’t work then redownload the file with your antivirus disabled and try the steps again. If that still doesn’t work then that’s as far as my knowledge goes on this matter.