I may have fixed this problem. I have a laptop with the same configuration and was having the same bluescreen crash with Chrome sandboxed. I uninstalled Chrome and reinstalled it without any extensions. The problem does not occur now.
I decided to try it on my desktop and just disable all five of my extensions. This worked as well ... no more bluescreen when running Chrome in the Avast! sandbox. I added the extensions back one by one to see if any of them were causing the problem, but I know have them all enabled and I am still running fine.
So, I really don't know what is going on with this or how extensions might play into the problem, but my installation of AIS is working great right now. My computer is fast and I have no more bluescreens of death when closing sandboxed Chrome. I am happy and I hope it lasts.