AKS1,
I replied to you, but you apparently didn't see it.
Let's capture a minidump of the crash and send it to the Apple engineers to analyze.
To set up your machine to capture a minidump, right click on "My Computer", select "Properties", select the "Advanced" tab, select the "Startup and Recovery" Settings button, select "small memory dump" from the popup. When it crashes, look for the MiniDump file. It's usually in the folder "C:\WINDOWS\Minidump" and is called something like Mini<number>-<number>.dmp.
And then
send it to the apple moderator. Tell her Toonz sent you. It doesn't hurt to put the URL to this discussion thread, so that whoever gets it has some context. Also tell them what you were doing when the system crashed.