On my Lumia 535 I downloaded the update and it failed to install and is now switching on & off. How can I fix this?

[Windows Central Question]

in my lumia 535 downloaded update and its failed to install and switch on & off happening

installing failed and switch on not happening

 

[Dietrich Cleijne]

Re: in my lumia 535 downloaded update and its failed to install and switch on & off happening

What did you install, what failed, and what is not happening?