gistfile1.txt

@echo off
setlocal enabledelayedexpansion

:: Change to your target folder
cd /d "C:\Path\To\Your\Folder"

for %%F in (*_*.dll) do (
    set "filename=%%~nF"
    set "ext=%%~xF"
    
    :: Remove the trailing underscore and numbers
    for /f "tokens=1 delims=_" %%A in ("!filename!") do (
        ren "%%F" "%%A!ext!"
        echo Renamed "%%F" to "%%A!ext!"
    )
)

endlocal
pause