I did a clean install of Windows 7 and everything worked fine afterwards except my touchpad - it worked but didn't support scrolling, etc.
I checked the Device Manager and noticed there were a number of unrecognized devices. At that time, there were three Base System Devices and two Unknown Devices. And under Mice and Pointing Devices, only a standard PS2 mouse was listed - no touchpad. (Same in Control Panel.)
I installed the Synaptics driver
and the touchpad showed up under Mice and Pointing Devices. Now I have scrolling etc, and the Synaptics touchpad now shows up under Mouse in the control panel. So the touchpad problem is fixed - and now there is only one Unknown Device in the Device Manager.
But I have no idea what to do with these other devices or how to figure out what they are - see screencaps. If I click on Update Driver, I just get a message back saying Windows is unable to install the device.
Any ideas? Or do I just wait and see what other devices fail to work?