Here's what I think happened. I had a crash about an hour after the sytem woke up (presumably from hibernate--I had set "sleep" for two hours) with a standard (old) firewire HD on. The system automatically directed me through a few steps which showed a Stop 0x9F 1394 problem, and suggested the solution was (via knowledge base) a 929762 update. I was then directed to update center where I was instructed to download and install Windows6.0-KB929762x86m su.. But when I tried to install it , it said this update does not apply to my system. No problem seems to occur when I simply shut down and restart with the HD connected. One other point, I was also connected to my iPod at the time, but that's a USB connection.