# Put the Adapter in the Computer

| NOTE: If you are replacing an existing adapter with the PRO/100 adapter in Windows*, see Removing an Existing Adapter.

1. Shut down your operating system. Windows users: click the Start button, and then click Shut Down.

2. Turn off and UNPLUG the computer before removing the computer's cover.

   | WARNING: Turn off and unplug power to the computer before removing its cover. Failure to do so could endanger you and may damage the adapter or computer.

3. Remove the cover bracket from a PCI bus master slot by unscrewing the screw that secures it. Most computers have bus master-enabled slots. If you have configuration problems, see your computer’s documentation to determine if the PCI slots are bus master-enabled.

4. If you want to enable the Wake On LAN* feature, see the Connect the Wake On LAN Power Cable before completing the rest of these steps. Note that this cable is not necessary if your system uses PCI bus master 2.2 slots. Note also that not all adapters have the WOL feature.

5. Insert the PRO/100 adapter into a PCI slot and push it into the slot until it’s firmly seated. Then secure the adapter bracket with the screw you removed in step 3. Your adapter or PCI bus may vary in its actual appearance.

6. Repeat steps 3 to 5 for each adapter you want to install. See Installing Multiple Adapters for more information.

7. Replace the computer's cover and plug in the power cord.

8. Turn the power on. The computer's PCI BIOS automatically assigns resources to the adapter(s). If you get a PCI configuration error, see PCI Configuration Troubleshooting.

| NOTE: To install an Intel 10/100 Ethernet adapter using the HotAdd feature in a Windows* NT 4.0 system, you must first replace the OEMSETUP.INF file in the root directory with the OEMSETUP.INF file in this directory. An easy way to do this is to create a drivers disk for Windows NT 4.0 using the Create Install Disk utility or the Makedisk utility. After you have done this, replace the OEMSETUP.INF file on the floppy disk with the OEMSETUP.INF file in this directory (HOTADD.NT4) and use that disk to install the drivers.

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