I have a couple of issues that are currently happening to one of our M4400 laptops. These issues started about a month ago, and are getting progressively worse. I think they are related, as they both started happening at the same time.
Issue 1. Clicking on the tabs in Google Chrome causes the tab to suddenly close. We are not clicking on the X within the tab. It starts intermittenly, and the only way we have discovered fixing the issue is a triple click on the scroll. We have tried multiple mice, and if they do not have a scroll that can be clicked, we must reboot the machine.
Issue 2. When docking or undocking the laptop, the mouse pointer moves around correctly, but the buttons are disabled, you can not drag a window, close a window, double click on an icon, minimize a window, or any other function requiring a mouse click. The workaround we have here is a CTRL-ALT-DEL then start Task Manager...voila, mouse buttons work again.