This was the last drive released for the Acer Aspire D260 network card driver. Note that this is a Windows 7 driver and as such will normally only install on a Windows 7 machine unless you try and run it in compatibility mode. This driver is version 5.60.350.6 and was released in March 2016.
The driver for the Acer Aspire D260 network card is located inside a zip file. Open the zip file with 7zip or any other program and extract the file or simply click on the install file. From there the driver will install on you computer. You should check your version of the driver first or you can simply download and install the driver. If your current version is the same it will tell you this when it checks for the driver. There are other Acer drivers on this website and also check here.