Mouse isn't working
If your M525 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 one USB port to another
- Moving the receiver to another computer
- Plugging the receiver into a USB hub, KVM switch or other unsupported device (NOTE: Your Unifying receiver must be plugged directly into your computer.)
- Using your wireless mouse on metal surfaces
- Radio frequency (RF) interference from other sources, such as:
- Wireless speakers
- Computer power supplies
- Monitors
- Cell phones
- Garage door openers
Before connecting your M525:
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Fix or rule out the potential problems listed above.
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Turn your computer on.
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Insert fresh batteries in your mouse (see answer 360023405233 for instructions).
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Plug the Unifying receiver directly and securely into a working USB port on your computer.
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Turn on your mouse (the power switch is on the bottom of the mouse).
The power indicator on top should turn green for a few seconds, letting you know there is enough charge for the mouse to work. The light then goes out to conserve battery power..
Reconnecting your M525
NOTE: These instructions use Windows screenshots. Macintosh will look slightly different, but the instructions are the same.
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Download and install the latest software from the M525 Downloads Page.
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Launch the Logitech Unifying Software.
- Windows: Start > Programs > Logitech > Unifying > Logitech Unifying Software
- Macintosh: Applications / Utilities / Logitech Unifying Software
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Click Next at the bottom of the Welcome screen.
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Follow the on-screen instructions to turn your mouse off and then back on.
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When your mouse is detected, you'll see this window:
Select Yes and then click Next. -
Click Finish to exit the Logitech Unifying Software. Your mouse should now be connected.
Mouse frequently loses connection
If your mouse frequently stops working and you keep having to reconnect it with the Unifying receiver, try these suggestions:
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Keep other electrical devices at least 8 inches (20 cm) away from the Unifying receiver
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Move the mouse closer to the Unifying receiver
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Move the receiver to a different USB port on your computer
Frequently Asked Questions
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