Idenity Safe turns off regularly

After I log into Identity Safe it all works fine.  If I leave my computer for a few hours or overnight it shuts down and I have to log back in again.  Is it suppose to work like this?  It never shut down before unless I did a restart.  It would be up for weeks at a time.  Now it's everyday, sometimes 2-3 times a day I have to log back in.  Very annoying!!!