What application are you playing them with?
WMP 11 has an option "Allow screen saver during playback"
Uncheck that in WMP-Tools-Options-Player tab if using WMP

....Alan
--
Alan Edwards, MS MVP Windows - Internet Explorer
http://dts-l.com/index.htm



On Tue, 20 Apr 2010 14:01:44 +1000, in
microsoft.public.windowsxp.newusers, DD
wrote:

I am sure there must be an easy way to temporarily disable the
screensaver and stop the computer going into hibernation or sleep modes!
I want to make it possible to watch a video file without having to keep
manually deactivating these functions. Can anyone help?

Dennis