Sometimes the computer fails to "handshake" with the dongle.
You can check for official firmware or optional customization software at the Official HP Software and Drivers page by entering your serial or product number. HP Accessory Center: HP Wireless Optical Mobile Mouse Driver Fha 3412
: Slide the power switch on the bottom of the mouse to the ON position. Sometimes the computer fails to "handshake" with the dongle
button on the bottom of the mouse and the receiver. Press the button on the receiver first, followed by the button on the mouse within 60 seconds Hardware Diagnostics: HP PC Hardware Diagnostics for Windows HP Wireless Optical Mobile Mouse Driver Fha 3412
: Symmetric, ambidextrous shape with rubber sides for a comfortable grip.