很讨厌的WIN 7屏幕问题 (图)

我经常遇到这个问题。不一定是REALPLAYER,有时是其他APP。 ANYWAY,问题就是我CLOSE了某个APP后,在显示器上会出现“留影”(见下图)。除了重启没办法消除它。 Win7 ultimate with all patches. Video card is Nvidia GeForce 9800GT with the latest driver. LCD 22" Acer. Any clues? It's just weird and so annoying.