This problem is likely to be a lost connection. The connection between the mouse and the USB receiver can be lost due to several reasons such as:

• Low battery
• Moving the USB receiver from one USB port to another
• Moving the USB receiver to another computer
• Plugging the 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 device.

Before connecting your M215:

NOTE: You may need a working mouse to download software to reconnect the M215 Mouse.

1. Make sure you have a fresh battery in your mouse.

2. Make sure the mouse is turned on.

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

4. Turn your computer on.

5. Download connection utility from the Logitech web site.

6. Follow the below procedure to re-connect your M215 Mouse.

Re-connecting your M215:

1. Double-click the file you just downloaded and click Run as shown below:

   

2. You will see the Re-connection Utility screen. Follow the instructions shown below:

   

3. You will see the following window:

   

4. Click Done if the mouse is working properly, otherwise click Retry to repeat the connection process.

Additional Information:

If the above solutions do not resolve your problem, consult Knowledge Base article 14451 for instructions on contacting Logitech Technical Support.