@simon Honestly despite being a techy person and now a programmer, I've never been good knowing what download option to pick. Doesn't help you need to know if your system is 32 or 64 to choose between 86 and 64 🙄

These days most windows are 64 bit though, so unless your target audience is "people/businesses with very old machines" just heavily recommended the 64 (and have a clear error installer for people who need the 32!)