I have a ligitech m510 mouse its not working any longer and the light on the top is solid green can you help

You might have to uninstall the mouse then restart your computer then reinstall the mouse and its drivers
click start control panel administration tool computer managenent device manager scroll to mice and other pointing devices you might see a yellow question mark? right click to update drivers
make sure the lead from the mouse has a secure seating and the lead is not bad/faulty
(if applicable)
click start right click on my computer select properties device manager control scroll to mice and pointing devices you might see a yellow question mark? right update driver
make sure the battery is good (has full charge)also you might test the usb device for the mouse is inserted correctly into the usb port (if applicable)
click start control panel mouse you should see 4 tabs buttons,pointers,pointer options and hardware under hardware you can troubleshoot also you can select properties under driver you will have options to update driver,rollback driver or uninstall and under hardware you can troubleshoot
hope this helps