There has appeared a large white pixel in the center of my Windows XP desktop. I am currently running two monitors and it only appears on the primary. I don't believe the two monitors is the cause since I've been running two for quite some time. What's strange: when I place my cursor over the white pixel it seems to turn a shade of gray. Then, when I click the mouse somewhere else on the desktop the pixel returns to white. Also strange: when I right-click on the desktop (to bring up Properties, for instance) it still works just fine, except when I right-click over the pixel, which then does nothing. Now this pixel doesn't appear on any windows I open up, just the desktop. Does anyone know what is causing this and how I might fix it? Thanks for any help you can offer!!

Have you tried right clicking & then refresh?

Also have you tried changing the desktop to None (for example)?

Also right clicking make sure Lock the desktop is Not clicked.