Start 10 demo disables desktop (explorer) when it expires
Just had a case where the demo for Start 10 expired when I was on vacation. When the PC started it went to a black screen with no desktop, no message, no indication of the reason for the problem. Trying to start Explorer.exe caused the desktop to appear briefly then crash agan. To get things back I had to run Task Manager, kill the Start 10 process then start Explorer.exe to get the desktop back. At that point I could uninstall Start 10 and the machine worked perfectly from that point.
Having a trial that can make a computer inacessible once it expires doesn't seem the brightest idea!!