DOS batch file utility to rename files in bulk.

bulk_file_rename.bat

@echo off

rem Name: Bulk File Rename
rem DOS batch file utility to rename files in bulk.

setlocal enableDelayedExpansion

set /p "string1=Enter the character sequence to be replaced in the filename: "
set /p "string2=Enter the new character sequence in the filename: "

for %%F in (*%string1%*.*) do (
  set "filename=%%F"
  ren "!filename!" "!filename:%string1%=%string2%!"
)