Skip to step 9. 7. If computer doesn't already have a modem, find a slot that matches the pins. PCI modems have fewer pins and fit into a smaller slot than ISA modems. Knock out or unscrew the metal plate on the slot holder on the back panel, and insert the modem into the slot. Replace the computer's back panel, if necessary, and any removed screws.
Screw modem into slot holder if it has a screw hole.
Reconnect the monitor, keyboard, and mouse. Connect the modem to phone line. Reboot the computer. If Windows detects modem upon startup, follow the on-screen instructions to install the driver and additional software. If Windows doesn't detect the modem, manually complete the installation using the Add New Hardware control panel.