I want to unroot my device HTC 816 a5 to update OTA 6.0 official(yesterday I got update msg) I have downloaded it and when I was trying to I install it reboots to (screenshot). I had Google it and it's to UNROOT your device and try it. Now the problem is I am confused to unroot it .. I also tried ROOT UNINSTALLER no use ..tried ROOT EXPLORER to delete system/bin/su not successful... I think here are more helping suggestions... Plz suggest me the best way...thanks in advance..
Below error I had..