My G4 went into the boot loop and it was out of warranty. My UK insurance company came to the rescue with a replacement from Carphone Warehouse. All done within 48 hours.
I regret installing Microsoft Launcher. So would like to revert back to the original LG G4 launcher. From viewing the internet, this appears to be more involved than just uninstalling the app. Would appreciate a step by step instruction guide please. ☹