Help with IF in batch files

@ echo off
:main
cls
echo WARNING Incorrect use of this routine can render your system
echo inoperable. Use at your own risk.
echo.
echo Type the full name and extension of the file you want to delete.
echo If no path is specified, the file is assumed to be in the same
echo directory as this batch file.
echo Use '>' instead of '\' in path.
echo.
set /p file="Enter Filename "
echo %file%
echo.
choice /M "Executable file?"
echo %ERRORLEVEL%
echo.
pause
if not exist %file% (
echo File does not exist
echo.
goto exit )
if %ERRORLEVEL%==2 goto delete
:kill
echo kill
echo.
taskkill /IM %file% /F /T
pause
:delete
echo delete
echo.
attrib -r -a -s -h -i %file%
del /P /F %file%
if not exist %file% (
echo File deleted
echo.
goto exit )
choice /M "File not deleted. Do you wish to delete on next reboot?"
echo %ERRORLEVEL%
echo.
if %ERRORLEVEL%==2 goto exit
REG ADD HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Currentversion\RunOnce /v "Del "%file%" OnNextReboot" /d ^"cmd.exe /c DEL /F /Q \"%file%"" /f"
choice /M "Do you want to reboot now?"
echo %ERRORLEVEL%
echo.
if %ERRORLEVEL%==2 goto exit
shutdown -r -t 60
:exit
echo exiting
echo.
pause
exit