The Dell web site does not list all the 64 bit drivers for the Mini 1012. After loading all the listed drivers there was still one unknown driver listed in the Device Manager.
This is how I identified the device and installed the driver.
If you go to Programs > Accessories > System Tools > System Information > Components > Problem Devices - you can obtain details about the particular problem device.
In this case gave the following information :- PCI/VEN_ '14E4 DEV 1615 SU
If you then input this information into this web site PCIDATABASE.com you will be advised the details about the problem device.
In this case it was the Broadcom Crystal Video Decoder.
If you them go to the Broadcom Crystal web site and obtain the latest driver your problem device will be solved.