Thanks for the info. I just tried installing the Samsung LCD drivers. I couldn't install them in Safe Mode. I installed Digital version of the drivers since I'm using DVI. It still "crashed". I also tried the Analog driver.
I also do not have on-board video, so I cannot disable that.
When the issue occurs the only thing I can do is do a hard power down. Turning the monitor off and on or reconnecting the DVI doesn't make a difference.