When I came home today, this machine had rebooted and was at the log on screen. I don't know why, it was fine when I went out. Upon logging on and the inevitable waiting whilst all the junk starts up, BOINC started and it started running 3 Asteroids work units, (and an Einstein). Two of them had elapsed times just short of 2 hours and were running, showing roughly 30% complete each. The third had an elapsed of almost three hours, and 0.0% Progress. It appears to be running normally, elapsed increasing, remaining decreasing, progress rising. It is http://ps_150702_input_78688_10 this work unit. No action taken, just watching for now.

When I came home today, this machine had rebooted and was at the log on screen. I don't know why, it was fine when I went out. Upon logging on and the inevitable waiting whilst all the junk starts up, BOINC started and it started running 3 Asteroids work units, (and an Einstein). Two of them had elapsed times just short of 2 hours and were running, showing roughly 30% complete each. The third had an elapsed of almost three hours, and 0.0% Progress. It appears to be running normally, elapsed increasing, remaining decreasing, progress rising. It is http://ps_150702_input_78688_10 this work unit. No action taken, just watching for now.

Heat can cause that to happen, is it extra hot where your pc is?

It is probably the warmest day of the year so far. This might explain the restart of the machine, although there is a seriously big heatsink on it, but not of the work unit. If it was a checkpoint issue, why did the others start where they did?

It completed without further issue and with a "normal" run time, so it has cheated me somewhat, but never mind, a mystery it shall remain.

remove screen saver or sleep time or hibernate. let the computer always on at the power panel