I have a Nokia 928 windows phone running 8.1 i got a lightening bolt over gearr symbol?

[WPCentral Question]

lightening bolt over gears on the touch screen

 

[Harrie-S]

lightening bolt over gears on the touch screen

To recover this you have to do a soft reset. This will not delete any data on your phone.

Hold the Volume Down + Power buttons until the phone vibrates and reboots (about 10 seconds).

Keep your hand from pressing Volume Up during a boot.