I think I've fixed the problem. It got to the point I couldn't run the system for long at all without it freezing, so I did the following: So it wasn't the dgemm file apparently. My guess it was a combo of dirty contacts and a corrupted Win10 install. I hope this is the end of the problem, as the warranty ends next week. Thanks for all the help! Ed    
I've got an XPS 8940. It has taken to freezing up, or locking, I'm not sure which. When this happens, the cursor/mouse arrow freezes and the system is unresponsive. I can wait for an hour and it still won't come back or do anything. The only way I can get out of this is to shut the computer down. Unfortunately, that doesn't work either. The system starts up again, but does not boot or connect to the monitor, the only thing that happens is the power light comes on. The only way I can get the computer to work again is to unplug it from power, wait 30 secs plus, then plug it in. When I do that, it reboots, but often the apps I had open are in strange positions/shapes. Yesterday, it froze when I happened to have TaskManager onscreen. It showed something called 'dgemm' taking 99+percent of the CPU. I have no idea what that is or if it's relevant. I've run every Dell and Windows diagnostic and can find no errors. Any ideas? Thanks, EdB   Dell XPS 8940, i7, 16gb RAM, 256g SSD, Nvidia 1660. Windows 10 home up to date. Two monitors connected. System used for Lightroom/Photoshop and regular browsing/videos.
XPS 8940, freezing/locking, DGEMM involved?