Ever since the upgrade from Windows 8.0 to Windows 8.1, occasionally and totally unpredictably, my screen starts blinking, Any open program starts to move between foreground and background, which makes the laptop almost impossible to use. Usually, but not always, if I restart the problem goes away, but sometimes it has come back after the restart as well. The problem is totally random; the laptop may go well for hours (or even days), and then all of a sudden start blinking. I have already repaired the Windows installation, and I have upgraded all the drivers. I have also run all the Dell tests by pressing F12 upon boot, and no hardware errors have been identified. My laptop is a Dell XPS with the OS at 64 bit. Here you can see a video reproducing the issue: Video reproducing the problem
Any ideas of what might be happening?
Thank you.