Be aware of a problem I realized today on x64 W7 SP1! You need to check what Ff version you are on. I mostly use Cyberfox and in updating and even just configuring it, I'll often have to "Disable Forced Programs" in Sandboxie. Today I noticed Ff wasn't v36, even though I knew I'd updated it a few days ago. I didn't recall recovering an image since then either. So I updated again, CCleaned, re-booted and then re-imaged only to discover I was back to v35. After eliminating CCleaner and the PC restart as possibilities, recalling my Cyberfox experiences, I updated again with Sandboxie's "Disable Forced Programs" enabled but the same thing happened. Finally, I completely exited Sandboxie and the update stuck!