How can I fix the endless spinning gears/cogs bug?

[Windows Central Question]

in my windows phone lumia 520

 

[NokiLumia520]

Try removing SD card and when it finishes istalling you can put it back in. This worked on mine lumia 520

 

[Chintan Gohel]

in my windows phone lumia 520

was this while installing an update or reinstalling the OS?
Can you try a soft reset? Soft Reset is holding the Volume Down & Power buttons until the phone vibrates and reboots (about 15 seconds). This reboots the phone with a cleared out RAM and Cache. No data is lost. It is good for when the phone freezes or you experience a glitch of some sort.

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