My HTC one M7 shows me update available and when i try updating with wi-fi it show me error..

[AC Question]

My HTC one M7 shows me update available and when update if try updating it with wi-fi, after some mins it stop nd show me error. please what can i do to update. i need fast response.

 

[Rukbat]

Is the phone rooted? You can't update a ROM that's rooted (or used to be rooted).