How to connect and install a computer mouse

Today, almost all wired mice use USB as the interface to the computer. Older computers may use PS/2 or Serial as an interface to the computer. If your mouse is wireless it can be communicating over Bluetooth, radio frequency (RF), or infrared (IR).

Below are the steps on how to connect each of these types of computer mice.

USB mouse
Wireless mouse
PS/2 keyboard

Before getting started

  1. Difficulty of installing computer mouse should be a 1 out of 5.
  2. When connecting the PS/2 or Serial mouse, make sure the computer is turned off. If the mouse is a USB mouse, the computer can be on or off during the installation.

Connect cables

Wireless Mouse

A wireless, or cordless, mouse has a receiver device that receives signals from the mouse and sends signals to the mouse. The receiver connects to the computer using a PS/2 or USB port. Check the PS/2 Mouse or USB Mouse section above for details on connecting the wireless mouse to the computer.

PS/2 Mouse

Connect the mouse to the PS/2 port on the back of the computer. If you're using a USB mouse, skip to the next section.

When looking at the back of the computer, you'll notice two PS/2 ports next to each other. Verify you're connecting the mouse into the teal or green port, as shown in the picture below. If your PS/2 ports are not color coded, the mouse port will be the one furthest away from the left edge of the computer (when looking at it from the back). If the ports are vertical and not horizontal, as shown below, the mouse port could be either port, depending on the case and motherboard. Look for a small symbol next to the port to identify which one is the mouse port.

PS/2 port diagram Pictures of computer green and purple PS/2 ports.

USB Mouse

Connect the USB mouse to one of the USB ports on the back or front of your computer. If you are using a USB port hub, connect the mouse to a USB port on the hub.

Illustration of USB connectionsConnecting USB mouse

Serial Mouse

Connect the mouse to the serial port on the back of the computer. If you have more than one serial port on the computer, we recommend connecting the mouse to the first port. Once connected, depending on your computer setup, you may need to configure the mouse in CMOS setup as found in the next section.

Serial mouse connections

Install software and drivers

Setup in CMOS setup

If you have connected a serial or USB mouse, it may be necessary to setup the ports in CMOS setup.

If the mouse you are using is a serial mouse and it's having issues being detected, verify that the serial ports or COM ports are enabled and assigned properly in CMOS.

If the mouse is a USB mouse, ensure that USB is enabled and if available, also ensure that the USB legacy support is enabled. The USB legacy support allows the mouse to work in legacy mode, for example, DOS.


Additional information