cannot update 4.4.2 /// red exclamation mark after installing HELP

[natathaphol]

cannot update 4.4.2 /// red exclamation after installing HELP

so after i finished downlaoding new update ota it brings me straight the installation. I waited and waited until the installation part is done and something hits me in the heart. Red exclamation mark came up and I couldn't do anything. Is there anyway to solve this ?

I am using HTC One M7 unlock bootloader no root nothing s on is that the cause that makes my ota update error ?

 

[rosh88]

I used to have this problem and the culprit was having the phone plugged in for power while the installation happens, make sure its not connected to a wall nor usb and it should work fine.