I have a user that whenever she leaves her machine on and does not use it for a few minutes it will lockup and the only way she can use the machine is reboot. I had her shut down the screen saver I also noticed she had an icon in her sys tray that apppeared to be a flashing camera once we got rid of the flashing camera icon another icon which looked the planet earth appeared. This icon represents some sort of program that will enable you have different wallpapers appear at randum one at a time. This might be the problem not really sure if someone has another idea or thought sure appreciate your input.
Thanks Markus R Bertel