• Mouse is not working
• Mouse frequently stops working

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

• Low battery levels 
• Moving the USB receiver from one port to another
• Moving the USB receiver to another computer
• Plugging the USB receiver into a hub or other unsupported device such as a KVM switch (NOTE: Your Unifying USB receiver must be plugged directly into your computer.)
• Using your cordless 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

Before you connect your mouse to a Windows computer:

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

2. Turn your computer on.

3. Insert fresh batteries in your mouse. For instructions on changing your mouse battery, see Knowledge Base article 23493.

4. Turn your mouse on. The power indicator on top should be green.

   

5. If the power indicator is not lit, move the power switch on the bottom of the mouse to the "ON" position. The power indicator should now turn green.

   

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

Reconnecting your mouse

To reconnect your mouse to a Windows computer:

1. Download the correct version of Logitech SetPoint mouse and keyboard software from the M325 Downloads page.

2. Launch the Logitech Unifying Software:
   • Windows: Start > Programs > Logitech > Unifying > Logitech Unifying Software

3. When the Logitech Unifying Software Welcome screen displays, click Next to continue.

   

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

   

5. When your mouse is detected, you'll see the confirmation message below. Click Yes and then Next.

   

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.

• Keep other electrical devices at least 8 inches (20 cm) away from the USB receiver

• Move the mouse or keyboard closer to the USB receiver

• Move the receiver to a different USB port on your computer

Contact information

Need more help? see Knowledge Base article 23480 for how to contact Logitech Customer Care about this product.