The Super Nintendo Entertainment System (also known as Super NES, SNES or simply Super Nintendo) was a 16-bit home video game console developed by Nintendo. It was originally released in 1990 in Japan (where it was called Super Famicom or SFC for short) and some time later in North America, Europe and other territories. The Super Nintendo was the best selling 16-bit game console of its era, despite a late start and competition from the Sega Genesis.
These days there are a number of great emulators for the Super Nintendo which have very high emulation accuracy. Playing and completing games with these emulators should be no problem. If you want accurate emulation higan is probably your best choice if your PC is fast enough. If your PC is a bit too slow for it or you want a more friendly UI, try Snes9x. Despite its high ranking on this page, ZSNES should probably be skipped.