Hi I have just upgraded my KD-49XE8004 TV to Android Oreo. What a nightmare, after the upgrade the tv rebooted itself after half an hour. Sony support told me to solve this i must do a factory reset. Did this , however now I am trying to reload some of the apps i had on but cannot find anywhere in the settings to allow downloads from other sources. Used to be in the security settings. Anybody now how i can get round this.