• Mouse isn't working

• Mouse frequently stops working

Mouse isn't working

If your M545 mouse isn't working, the problem is likely a lost connection. The connection between the mouse and the Unifying receiver can be lost for several reasons, such as:

• Low battery levels
• Moving the receiver from USB one port to another
• Moving the receiver to another computer
• Plugging the receiver into a USB hub or other unsupported device such as a KVM switch (NOTE: Your Unifying receiver must be plugged directly into your computer.)
• Using your wireless mouse on metal surfaces
• Radio frequency (RF) interference from more powerful devices such as:
  • Wireless speakers
  • Computer power supplies
  • Monitors
  • Cell phones
  • Garage door openers

Before reconnecting your mouse

1. Fix or rule out the potential problem sources listed above.

2. Insert a fresh battery in your mouse (see answer 360023253094 for instructions).

3. Make sure the mouse is turned on (see answer 360023253094 for instructions).

4. Plug the receiver directly and securely into a working USB port on your computer.

5. Turn your computer on.

Reconnecting your mouse

1. Download and install the latest software from the M545 Downloads page.

2. Launch the Logitech Unifying Software:

   • Windows 7: Start > Programs > Logitech > Unifying > Logitech Unifying Software

   • Windows 8: Start Screen > Logitech Unifying Software

3. Click Next at the bottom of the Welcome screen.

4. Follow the on-screen instructions to turn your mouse off and then back on.

   

5. When your mouse is detected, you'll see a confirmation message. Click Yes and then Next. Otherwise, repeat from step #4.

   

6. Click Finish to exit the Logitech Unifying Software. Your mouse should now be connected.

If this solution doesn't work after a couple of attempts, restart your computer and try the reconnection process again.

Mouse frequently stops working

If your mouse frequently stops working and you keep having to reconnect it, try these suggestions:

• Keep other electrical devices at least 8 inches (20 cm) away from the Unifying receiver
• Move the mouse closer to the Unifying receiver
• Move the receiver to a different USB port on your computer
• Check for interference from USB 3.0 devices (see answer 360023253094)