If you had got your Latitude D810 unit without any 3000 N200 driver CD or the latter is lost, you may choose to follow the links below. Without a special Latitude D810 driver to your unit, you won’t be able to use all its Lenovo functionality. The basic 3000 N200 driver from Windows is only able to support the minimum Precision M2300 set thereof. You are really in need of a fully-featured authentic 3000 N200 driver.
For Latitude D810 download, please just follow the MicroScan A500 link.