Start winrar a -dr -ep1 "BK.rar" C:\test\*.*

Start /wait winrar a -dr -ep1 "BK.rar" C:\test\*.*

@echo off
for /l %%i in (1,1,100) do cmd /c echo.%%random%% %%time%%
pause

27481  5:38:52,89
27481  5:38:52,95
27484  5:38:53,01
27484  5:38:53,09
27484  5:38:53,15
27484  5:38:53,23
27484  5:38:53,29
27484  5:38:53,82
27484  5:38:53,90
27484  5:38:53,96
27487  5:38:54,03
27487  5:38:54,09
27487  5:38:54,15
27487  5:38:54,23
Presione una tecla para continuar . . .

@echo off
for /l %%i in (0) do cmd /c echo.%%random%% %%time%%

http://blogs.msdn.com/b/oldnewthing/archive/2010/06/17/10026183.aspx

::AutoRun Murderer v1.0
::Date: 23:30 11/10/2010
::Author: Germaniac

@echo off
setlocal enableextensions enabledelayedexpansion

:init
cls
echo.AutoRun Murderer v1.0
echo.
set "count=0"
for /f "delims=:\ tokens=3" %%d in ('
"reg query HKLM\SYSTEM\MountedDevices 2>nul|find /i "\DosDevices\""
') do vol %%d: >nul 2>nul && (
	set /a "count+=1"
	set "drive[!count!]=%%d"
	echo. !count!. %%d:
)
echo.
set "select="
set /p "select=Select a number of drive>"
if !select! lss 1 goto :init
if !select! gtr %count% goto :init
set "autorun=!drive[%select%]!:\AutoRun.inf"
set "folder=0"
set "option="
call :dirHide %autorun% folder && set /p "option=Delete %autorun% folder [Y/N]:"
if /i !option!==y (
	for /l %%f in (%folder%,-1,0) do rd /q /s "\\?\!folder[%%f]!" >nul 2>nul
	if exist %autorun%\ (echo.ERROR: %autorun% folder not deleted.) else echo.%autorun% folder deleted.
	set /p "=Press any key for continue . . . " <nul
	pause >nul

)
if %folder% gtr 0 goto :init
if exist %autorun% if not exist %autorun%\ (
	set "line="
	echo.Analyzing file %autorun%
	for /f "eol=; tokens=1* delims==" %%k in ('
	"more %autorun% 2>nul"
	') do (
		set "line=%%l"
		if defined line (
			set "line=!line:/=\!"
			for %%f in (!line!) do (
				set "type="
				set "run=!drive[%select%]!:\%%~f"
				if exist "!run!" if exist "!run!\" (set "type=folder") else set "type=file"
				if defined type (
					set "option="
					set /p "option=Delete !type! !run! [Y/N]:"
					if /i !option!==y (
						if !type!==file (
							del /f /q /a "!run!" >nul 2>nul
							if exist "!run!" (echo.ERROR: Not deleted file.) else echo.Deleted file.
						)
						if !type!==folder (
							set "folder=0"
							call :dirHide "!run!" folder
							for /l %%f in (!folder!,-1,0) do rd /q /s "\\?\!folder[%%f]!" >nul 2>nul
							if exist "!run!\" (echo.ERROR: Not deleted folder.) else echo.Deleted folder.
						)
					) else echo.Not deleted !type!.
				)
			)
		)
	)
	del /f /q /a %autorun% >nul 2>nul
	if exist %autorun% (
		echo.AutoRun.inf file not deleted.
		goto :init
	)
)
echo.AutoRun.inf not exists.
set /p "=Press any key for continue . . . " <nul
pause >nul
goto :init

:dirHide
if not exist "%~1\" exit /b 1
set "%~2[!%~2!]=%~1"
for /f "tokens=4" %%i in ('
"dir /a:d /x "%~1" 2>nul|find /i "^<dir^>"|more +2"
') do (
	set /a "%~2+=1"
	call :dirHide "%~1\%%i" "%~2"
)
exit /b 0

C:\>C:\code.bat
Teclee su nombre : no muestra lo que sigue depues de un "=" igual
Has escrito : no muestra lo que sigue depues de un "
Teclee su nombre :

@echo off
:code
set "name="
set /p "name=Teclee su nombre : "
if not defined name (goto:code)
for /f "tokens=1* delims==" %%a in ('set name^|findstr /b "name="') do (
echo.Has escrito : %%b
)
goto:code

C:\>C:\code.bat
Teclee su nombre : muestra incluso depues de un "=" igual
Has escrito : muestra incluso depues de un "=" igual
Teclee su nombre :

fsutil fsinfo drives

for /f "tokens=*" %%a in ('tracert -h 2 www.google.es') do (echo.%%a)

'net.exe config workstation ^| find.exe "Windows" ^| find.exe /i "Versi¢n del programa"'

echo hola
cls comentario
set "a=adios" comentario
echo %a%
pause cometario