Each time I update V17, all appears to go well. The first time TCMD runs, it opens three batch files in my editor, UltraEdit, which has an alias UE. The latest install opened EXE1711.tmp.bat, EXE181B.tmp.bat, and {8D6AF0B5-09CB-4925-9FDA-4FA803CA220F}.bat. The files reside in c:\uses\duke\AppData\Local\Temp.