I installed this on Win7 - 32 bit - worked great - I would like to have seen less Christmas explosions from the fireplace (Smoke Stack - chimney) and maybe more control of numbers of flying articles allowing to increase or decrease each of the articles in the sky - more witches - less skulls - more ghosts - o well - you get the idea - I really like this program & it well add well to the front door of my house on Halloween.