If you shake any open window application fast, it minimizes all other windows, leaving this one open. Shake the window again, and all the closed windows will open up again. This is Aero Shake. But then, as life is all about having options, if you don’t like or use this feature, you can easily disable Aero Shake.
Type gpedit.msc in start search box and hit Enter to open the Group Policy Editor.
User Configuration > Administrative Templates > Desktop
Now in the RHS pane, navigate to Turn off Aero Shake window minimizing mouse gesture. Click on Edit policy setting and in the windows which appears, change its status to Enabled.
Click Apply > OK.