Yes, The Sims 3 does work on Windows 7 64-bit. I currently own an HP Pavilion laptop which contains Windows 7 64-bit and play all of my Sims 2 and Sims 3 games on it. Of course, I bought the laptop during September 2010 with 500 GB and I have it on DVD-ROM. I am not exactly sure if its the same for the digital download. I suggest you look further into it and see if there are some other customers who own the digital download version on Windows 7 64-bit. I hope I was able to help you.