Before rebooting, I removed the 'unknown device' thinking it might refresh. I ran Driver Booster again and it updated 10 or so drivers.
The same ntoskrnl.exe crash continued so I restored my system from a backup of 11 days ago, which I think was before the problem started. I ran Driver Booster looking for a fix and it updated 10 or so drivers (There was one 'unknown device' with a yellow exclamation mark. I went through all the drivers on my system as listed in the device manger and found no cases of red X. No problems were detected by any of these programs. I ran checkdisk, Avast antivirus thorough scan, an anti-malware checker, Windows 7 memory check, then a two-hour memory check downloaded from Lenova, the manufacture of my laptop. I had had having numerous blue screen crashes in the last two weeks which dump indicated was always related to ntoskrnl.exe.
I'm running Windows 7 Home on a Lenova Laptop.
