The Start Menu in Windows seems to open fast using this trick. Open the registry editor by going to Start ->Run ->regedit. Navigate to HKEY_CURRENT_USER\ControlPanel\Desktop. Double-click on MenuShowDelay and set it to ‘0’.
To close many Windows at once in Windows 7/Vista/XP, keep the [Ctrl] key pressed and select all the windows you want to close in the taskbar. Then leave the [Ctrl] key, and right-click on the last selected taskbar entry. Select “Close group” from the context menu that appears.