I know there are quite a few options out there for both of these, but I'm basically looking for the easiest emulator for both of them. I'm not too concerned about how many features the emulator has, I just want it to work and possibly still be supported by the developer.

So... does anyone have any suggestions for a Sega Genesis and NES emulator that fits that criteria?

Also, does anyone have any suggestions for credible web sites that provide safe downloads of these two systems?

OS of choice is W10.