When I try to right-click on a picture and click "set as desktop background" it takes the old wallpaper off, but I'm left with whatever background color I choose and no picture.When the computer has been sitting idle long enough for the screen-saver to come on, I have a setting on my computer that makes me enter my password again to get back into my computer.When I wiggle the cursor and that username/password box comes up, THEN and ONLY THEN do I see the desktop picture. As soon as I enter my username/password it goes back to what I was doing and I look at the desktop and it's still just the one background color and no picture.....What gives?Things to know: This is a computer my company lets me use. It has Windows XP SP3 on it. Built in wallpapers display properly. I've tried setting different image files as background with no luck. I've tried .jpeg and .bmp

AHH!!! I figured it out! Apparently I remembered wrong! I thought I had tried different formats, but apparently I had not! As soon as I converted the file to .jpeg, it worked fine!!!!

Hi Volant_Vixen, thanks for sharing the solution with us. If you encounter any other Windows Vista related issue in the future, please feel free to post it here. Sean Zhu - MSFT