I had never heard of that utility before, but I tried it out. My two crashes were SYSTEM_SERVICE_EXCEPTION and DRIVER_IRQL_NOT_LESS_OR_EQUAL but both times the "Caused By" was the Keyspan USB adapter.
Unfortunately, I have to use two of them - one for my mount, the other for my RoboFocus. I was previously using a much older laptop and never had a problem. This new laptop has been trouble free for a couple weeks, but having this error two nights in a row is disconcerting. One difference is that the new laptop only has two USB ports instead of four (meaning I could have each USB device in a different port) - but now I have the two Keyspan adapters hooked into a good USB hub along with my autoguide camera, and the other port goes to my QSI imaging camera (I want that on its own dedicated port).
I am using the most recent driver, so I just tried doing a reinstall of the driver. We'll see if that makes a difference. If that doesn't work, I may try downgrading to Windows 7 (though in many ways I consider that an upgrade in and of itself).
Thanks for the link, Jim! I actually work in the IT field of a local school district, so that Blue Screen utility is going to come in handy!