Advice 1: As in the BIOS to enable the network card

Installed on the computer network card is connected normally and works fine. But in some cases it can be disabled in the BIOS or operating system settings. In this case, the network card should be enabled.
As in the BIOS to enable the network card
Instruction
1
If you know that the computer has a network card, but the operating system does not see it, you should check the BIOS settings. Restart the computer when system starts press Del or F2. To enter the BIOS can use other keys Esc, F1, F11, F12, it depends on the computer model.
2
In the opened window, locate the BIOS section that includes the word Integrated. In it find the line Onboard LAN Controller or something similar in meaning on different computers these lines may vary.
3
Let's see what value exhibited opposite lines found. If Disabled, the map is really off. Select Enabled and save the changes, usually to do this, press F10 or select Save and exit setup. After the computer restarts, the operating system should see the network card.
4
It is possible that the network card is disabled in the operating system. Open "start" - "control Panel" - "System" - "Hardware" - "device Manager". Look for "Network adapters". If the card is off, it will be marked with a red cross. To enable it, click twice with the mouse and click at the bottom of the window the option "This equipment is being used (enabled)". Click OK, network card is enabled. Connect it to the connector and try to go online it should work.
5
It may happen that the string network card will be marked with a yellow icon with an exclamation point. Most likely, the network card is not installed drivers. Try to install them from the installation disc if you have it or find it in the Internet. To reinstall again, double-click the line network adapter, select the tab "Driver" - "Update". In the appeared window choose "Install from a specific location" and open the folder with the driver. Click OK the drivers will be installed.

Advice 2 : How to install network card driver

If your machine running very "slow", and after starting in the lower left corner there is an icon of two computers with an exclamation mark, it means that you have not configured your network connection, or driver is not installed for the network card. The network card drivers you need to install, even if you are not going to use it. Otherwise, your computer will regularly freeze and there will be serious failures in work of programs.
The network card drivers you need to install, even if you are not going to use it
Instruction
1
Locate the icon "my computer", click right mouse button on the icon in the drop-down menu, select "device Manager". A window will appear in which you will see "network adapters".
How to install network card driver
2
Click the right mouse button on the words "network adapters". Select to update the driver. A window will appear in the wizard of the hardware update. Here it is proposed to automatically install the driver. Keep it as is and don't press anything. Next, focus, insert the floppy disk with the drivers that you have to be (it usually comes with the purchase of a computer). Now press "next". Searching for drivers.
After the program has found the driver, you are prompted to select the driver you want. Select, click "next". Is to install the driver. When finished, close the installation wizard.

Restart the computer and then configure the network connection.
How to install network card driver
3
The arc option. If a disk with drivers there is no need from another computer to get online and download the necessary driver.
The downloaded installation file driver for your network card, copy to your computer. Remember the location where you copied the driver. Do the steps in the first method. Only now in the new hardware wizard select "install from a list or specific location". Click "next".
How to install network card driver
4
Put a tick in "include this location in the search". And using the "browse" button select the location where you saved the copied network card drivers. Click next. Is to install the driver.
How to install network card driver
Useful advice
On the same principle to install the driver and not only on network map, but also on other devices.
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