The problem is likely to be a lost connection. The connection between your Performance Mouse MX and your Unifying USB receiver can be lost for several reasons, including:

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

Eliminate any problem sources mentioned above that might be affecting your devices.

Before connecting your mouse:

1. Make sure you have a fully charged battery in your mouse.

2. Make sure the mouse is turned on.

   

3. Make sure the Unifying USB receiver is directly and securely plugged into a working USB port on your computer.

4. Turn your computer on.

5. Follow the procedures below to reconnect your mouse.

Re-connecting your mouse:

NOTE: The following instructions use Windows screenshots. Macintosh screenshots will look slightly different, but the instructions and messages are the same.

1. Download the correct version of Mouse and Keyboard software (SetPoint) from the Performance Mouse MX Downloads Page.

2. Launch the Logitech Unifying Software:

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

   • Macintosh: Application / Utilities / Logitech Unifying Software

3. The Logitech Unifying Software Welcome screen will appear. Click Next.

   

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

   

5. When your Performance Mouse MX is detected, you will see a confirmation message. Click Yes, then Next.

   

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

Additional Information

If the above solutions do not resolve your problem, consult Knowledge Base article 12700 for instructions on contacting Logitech Technical Support.