Instructions
Close any unnecessary background programs that you are running. Programs such as iTunes or other music players can appear simple in nature, but they can take a considerable amount of your computer's resources to use, which can slow down the speed at which your computer copies the data to its hard drive.
Move your computer closer to your network's router if you use a wireless router. Walls and other objects can interfere with your router's wireless signal, which can dramatically reduce your connection speed. If you cannot move your router or computer, consider purchasing a wireless repeater, which acts a relay point for your wireless signal.
Purchase networking equipment made the same manufacturer. Networking equipment manufacturers often design their hardware to be most compatible with other products they produce. If possible, use a modem and router produced by the same hardware manufacturer to maximize your connection speed and reduce the amount of time it takes to update "Diablo II."
Update the firmware of your networking equipment. Hardware manufacturers will often release updates for their products in their products in the form of firmware. These typically help improve the efficiency and strength of your device, which can help reduce the amount of time it takes to update "Diablo II." The firmware for routers are almost always available for free the website of the hardware's manufacturer.