The computer must have an enabled infrared port that's built into the computer, or an enabled infrared device attached to the computer. Desktop computers are likely to require an infrared device attached to a physical COM port.
Laptops are likely to have a built-in IR port, so no external device is necessary.
The computer must also have an installed infrared driver. Check the computer's documentation to learn if the computer supports infrared communication. If the computer is a Macintosh G3, or uses Microsoft Windows 98, infrared communication is built into the operating system. Some versions of the Macintosh iMac also have built-in infrared communication. The following procedure explains how to find out if your Windows 95 computer has an infrared driver installed.