I have a new Acer Aspire 1670 laptop which has worked fine for the past few weeks. However, I turned it on this morning (it worked fine last night) to find that my touchpad no longer works.
I don't feel this is a hardware issue in the sense that the touchpad has become unplugged from the internal PS/2 port, because the touchpad works for about 3-4 seconds after I log onto Windows/when the desktop loads up. That's the only time it works, it doesn't even work at the welcome/logon screen.
After those 3-4 seconds, something obviously happens that's preventing it from working.
I thought it might be my Wacom Graphire II graphics tablet, which is plugged in via USB 2. However, my touchpad and tablet have worked fine together for the past few weeks and have never caused any problems.
I unplugged the tablet, and uninstalled the tablet and touchpad drivers. I then rebooted, and - navigating around with the keyboard - reinstalled the touchpad drivers and rebooted. It still won't work.