My mouse or trackball is working inconsistently (and I have an internal modem)

Your mouse or trackball may be conflicting with your internal modem or another internal device on your computer. This means that the serial port your pointing device is connected to may be conflicting with the serial port that the internal modem is connected to. If connected to the same serial port as your internal modem, your pointing device won't work when the modem is active.

If this is the case, try to:

• Connect your pointing device to a different serial port on your computer.
• Reconfigure your modem so that it uses a different serial port address or a different IRQ.