There is also information on disconnecting a mouse from a wireless receiver.
A single Unifying Receiver can connect up to six wireless Logitech devices, including mice and keyboards.
Most wireless Logitech mice connect through a USB dongle called theLogitech Unifying Receiver.

Logitech
Download Logitech’s Unifying software.
Remove any Logitech Unifying Receivercurrently connected to your PC.
A welcome screen will appear.

The installer will prompt you to connect a Logitech Unifying Receiver to your box.
Connect it to an open USB port.
The next screen instructs you to turn your wireless mouse off and then back on.

Do so and then selectNext.
Disconnect it from Bluetooth to resolve this problem.
Your mouse should now be connected.
The final screen will ask you to confirm your mouse pointer is working.
How Do I Unpair My Logitech Mouse From My Receiver?
you might use the Logitech Unifying software to unpair devices, as well.
Here’s how to do it.
Launch the Logitech Unifying software.
A screen will appear with a list of currently connected Unifying devices.
poke the unit you want to unpair and then tapUn-pair.
On your mouse, press theConnectbutton; the machine should appear as an available Bluetooth machine on your screen.
Select it to complete the pairing process and use your mouse.
First,patch your Unifying Receiverif necessary.
Then try uninstalling and reinstalling the software, then sync your mouse to the receiver.
peek if you have the correct USB drivers installed on your PC.
Uninstall any applications interfering with your receiver, such as software used to connect gaming controllers.
If all else fails, replacing your wireless receiver is easy and relatively inexpensive.
you might identify wireless Logitech mice compatible with Unifying by the square, sun-like icon printed on the mouse.
This icon is also on the Unifying Receiver.
However, some wireless devices compatible with the Unifying Receiver also support Bluetooth.