# Put the Adapter in the Computer

| NOTE: If you are replacing an existing adapter with the PRO/100 adapter in Windows* 95, 98, Me, 2000, or NT, 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. Do not fail to perform this step.

3. Remove the cover bracket from a PCI busmaster slot by unscrewing the screw which secures it. Most computers have busmaster-enabled slots. If you have configuration problems, see your computer’s documentation to determine if the PCI slots are busmaster-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 busmaster 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.
   For 64-bit dual port adapters, install the adapter in a 64-bit PCI slot, if one is available. Otherwise use a 32-bit slot. The end of the adapter connector will be exposed. The exposed connector should not touch any part of the motherboard.

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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