I just had a strange event. I read a thread which sounded similar to a problem I have incurred since upgrading and advised going into control panel to adjust some power settings. I thought, I'll just have a look at this and hit the icon in my task bar. Nothing! I went through start/settings... nothing? I rebooted and everything was as it should be. Any ideas because, although I am not an expert on these things, I have had a computer for many years and this has never happened before.