I have a new Dell machine, with Win 7 Home Premium installed. However, I have a very annoying problem. When I click on something, such as the volume control in the task bar, the window will pop up and then disappear as soon as the mouse is moved off the icon. I can right click it and, holding down the right button, move the mouse up to the open... menu and it will work. Then I can move the mouse to mute the speakers or whatever. The same thing usually happens with most other clicks, such as a properties box. The window will not stay on top unless the mouse pointer is already on the window.
Is there a setting I haven't found in Windows that controls this? Nothing in the mouse settings affects the problem. And I've been unable to find an answer on line.
Help! Thanks in advance.