When checking <TMUT Installation Path>/iau_server, there is a file named iaurelay.tmlock.

If iaurelay.tmlock exists, do the following:

1. Go to system tray > Right-click TMUT icon > Click Exit.
2. Backup or move the iaurelay.tmlock to another folder.
3. Using services.msc, do the following:
   • Stop the TMUT service manually.
   • Start the TMUT service manually.
4. Start TMUT tool and try to update again.

If the issue persists, collect the following files:

1. Configuration files (located at TMUT installation path):
   • productInfo.ini
   • filter.xml
   • config.xml
   • server.xml
2. Log files
   • <TMUT installation path>\Tmutlogfile.txt 
   • <TMUT installation path>\servicelogfile.txt
   • ..\ relay\iaulogs\aurelay.log
   • ..\ relay\iaulogs\TmuDump.txt

Submit a case and provide the files to Trend Micro Technical Support.