Power saving glitch
I have my power option (XP) set to blank the screen after 10 minutes inactivity and this has worked for me for years.
Recently though, the screen will blank after ten minutes and instantly return, as if something is inhibiting the shutdown. There's nothing running that hasn't been running for ages, and, worst of all, it doesn't happen every day.
Yesterday it worked as normal, today it isn't. I've run What'sRunning and it shows nothing abnormal. Any thoughts?