Retrieve what disappeared when Win7 dragged the window

Win7's transparent effect is amazing, especially desktop perspective, window transparency, and many users who have upgraded to Win7 system have experienced it. However, some users have encountered a new "transparent" effect when using the computer. When dragging the window in Win7, the contents of the window disappeared, and only the border of one window is moving.




































It also exists, so this is definitely not the Aero effect of Win7. In fact, this is an ordinary system setup, which is also set to facilitate the user to view the background window. If you don't need it, you can turn it off through the system settings.
Open the Start menu, right click on "Computer" and select "Properties".

Open Computer Properties
On the left side of the system dialog, click “Advanced System Settings”.

Enter the Advanced System Settings
Browse out of the "System Properties" dialog box and click the Performance “Settings button in the “Advanced” tab.

Open Advanced Settings
Find and select “Show window contents while dragging in the <quo;Visual Effects” column.

Check the box to display the contents of the window when dragging 
At the end, press “OK> Save the settings and exit. Try dragging the window again, the window content will not disappear.