I'm running Win 7 & IE9. When I close IE9, my screen goes black for a couple of seconds, then goes back to normal. This also happens when I'm installing a program, & the "do you want to install/run this program?" window opens. I had this a few months back, & ended up calling Dell help, who had to dial into my computer & fix it, but I don't like anyone messing with my computer. I have a Dell XPS, monitor is Dell U1224M. I think it's something to do with the display/power settings, but I can't figure out which one.