Multi File Renamer

Question

OK, so I have a large collection of txt files and I need to rename them
I'm trying it this way

Option 1:

for %%f in (*.txt) do set name=%%~nf
ren * "%name%.*"

Example:

1 - File.txt
2 - File.txt
3 - File.txt
renamer.bat

Results:

1 - File.txt
2 - File.txt
3 - File.txt
3 - File.bat the bat file gets renamed

Option 2:

for %%f in (*.txt) do set name=%%~nf
ren "%name%.txt" "(1).txt"

Example:

1 - File.txt
2 - File.txt
3 - File.txt
renamer.bat

Results:

(1).txt
2 - File.txt
3 - File.txt
renamer.bat

My Goal
Results:

(1).txt
(2).txt
(3).txt
renamer.bat

I know I can just highlight all right click and rename all to (1).txt

Answer 1

To just consecutive numbering, use a counter:

@echo off
setlocal enabledelayedexpansion
set count=0
for %%f in (*.txt) do (
  set /a count+=1
  ECHO ren "%%f" "(!count!).txt"
)

NOTE: I "disarmed" the ren command. Remove the ECHO when you are sure, it does what you want.