Thanks for trying to help. I am sure I will survive!

The Screen setting in Power and Sleep is where I have set "When pluggedin, turn off after" to 1 minute. All other durations (2 mins to Never) give a black screen and no slide show.

Thanks Gary. Will try Power settings.

Since switching to windows 10 from windows 8.2 I have had problems in running slide show in lock screen. The slide show will only operate when the screen timeout setting is set to 1 minute. All...