The other day someone gave me their Dell Latitude to find a driver for an unknown piece piece of hardware in the device manager. After a bit of searching around I found the tricky bugger. The device was actually the built-in free fall sensor attached to the hard disk (you know to arrest the hard drive in case you drop the thing) but it wasn’t listed in the drivers section of the Dell Support page for that system. Anyways long story short, here’s how to get and install the driver for it and get rid of that unknown device in the device manager:
[step 1] Download the ST Microelectronics Free Fall Sensor
[step 2] Launch the EXE and let the subsequent installer complete, then reboot. That’s it.
P.S. Locating drivers for unknown hardware can be tricky so I sometimes use this utility to help: http://code.google.com/p/unknowndevices/