Removing the Case To install the network card in your computer, you will have to remove its protective case. To remove this cover from the computer, you will need to loosen and remove the screws in the back of the computer. Some computers will have these screws marked with tiny arrows or some other indicator. Once the screws are removed, carefully lift or slide the casing off and place it out of the way. If you cannot locate the screws to remove the case, or you cannot remove the casing , check your computer's manuals.
Most computers come with manuals that include a section on removing the computer's covering.
Locate an Empty Expansion Slot To install an internal network card there must be an empty expansion slot in your computer. Most computers will have several expansion slots that can be used. The expansion slots are generally situated in a row at the back of the machine, with covers that can be removed for access from the rear of the computer. Your NIC documentation should tell you what type of slot to use. Your network card will fit only into a standard slot.