I am using windows XP. Whenever I set an wall paper it DISAPPEARS at the time of rebooting my computer and the desktop becomes BLANK. The wall paper remains till such time I reboot the PC. Please help me to set the wall paper permanently.
How do you apply the Wallpaper. Do you go though the Display Properties?YES I go through display properties.  Can you tell me the solution?i usually save the pic SOMEWHERE in my HDD, then set it as background from there.The Picture your using as a wallpaper should be in a folder on your computer. You can click on it and 'Set to desktop background'.

Right click on the desktop and select 'properties' then desktop. The picture should be in the 'Background' List.

Did you select 'Apply' then 'OK'

If 'Apply' is greyed out select another picture, then select the picture you want.

What file extension is the picture you want as a Wallpaper?? Jpeg always work for me.There is no problem in setting a wall paper. My only problem is whenever I reboot the computer, the wall paper I set earlier disappears the the screen becomes blank. What is the REASON for that?
Are you set as the Administrater