How do: Unzip an .exe file (a firmware update for a Samsung TV) and what is the best unzip software to use...Thanks

Mac Book Pro 15" (mid 209) LION OS 10.7.5, Samsung instructions from their website: download firmware update. Doubleclick on USB and unzip file. (I dont have any unzip software as of yet; at least I dont think I do, because when I attempt to unzip the file, a page pops up that looks like hieroglyphics)

Thanks in advance.