There is only one file type that uses the .LUE extension:
Norton LiveUpdate Log File
Log file created by Norton LiveUpdate, a program that downloads and installs security updates for Symantec software; keeps track of virus definitions and other updates that have been installed.
LUE log files are generated automatically and are saved within the \Norton\Lue\Logs\ directory by default. Log.Lue is the primary log file, while TempLog.Lue saves temporary log data. A Download.Resumption.Lue file may also be created in the \Norton\Lue\Downloads\ directory when files are partially downloaded.
|Symantec Norton LiveUpdate|
Updated: January 13, 2020