Every now and then I have a day when everything I do with my tablet PC goes wrong.
Today I had just got set up for my class when I accidentally pressed the power button on the front of the tablet. It took a while for the tablet to shut down. Then it took me two goes to get it started again, because I got confused by the display set up (the tablet screen wasn’t showing anything and I ended up with another shutdown before I realized what was going on).
There were other problems too with the communication between my laptop and the plasma screen in that room (I’m going to move to another room if I can).
Maybe I should make some deliberate use of the “lock” button!