This is another driver for D-Link. This however is for a multi-port card adapter unlike the D-Link DU 520 driver which is for a single port adapter. Check your hardware again before you install this driver onto your computer. Note that this was the last driver released for this internal card.
Please note that this driver also includes a MAC driver for a MAC computer. Ensure that you uninstall the old driver before you install the new driver on your PC.