My batch script doesn't use if command correctly - batch-file

Question

I've spent a few days trying to get this batch script to work, but it just does not seem to work properly. It seems to just do whatever it wants after it prompts me to set a variable and i set it.
For example, I might enter n when it says that it doesn't seem to exist, and it will just end the script like it should. But if I re-open it, and it says the same thing as before, and I enter n again, it might just jump to :DeleteCalc, as if I typed y.
Here's my script:
#echo off
:Begin
color fc
title My script
cls
if not exist "C:\calc.exe" (
echo calc.exe doesn't seem to exist. Attempt deletion anyway? ^(Y/N^)
set "calcnotexist="
set /p "calcnotexist="
::This command checks to see if the user inputs a quotation mark. If they do, it echos that quotes cannot be inputted.
setlocal EnableDelayedExpansion
if not !calcnotexist!==!calcnotexist:^"=! set "calcnotexist="
endlocal & if "%calcnotexist%"=="" (
echo ERROR - Quotes cannot be entered.
pause
goto Begin
)
if /i "%calcnotexist%"=="Y" (
echo.
goto DeleteCalc
)
if /i "%calcnotexist%"=="Yes" (
echo.
goto DeleteCalc
)
if /i "%calcnotexist%"=="N" goto End
if /i "%calcnotexist%"=="No" goto End
echo ERROR - Unrecognized input
pause
goto Begin
)
:calcDoesExist
title My script
cls
echo calc.exe found. Delete? ^(Y/N^)
set "calcexist="
set /p "calcexist="
::This command checks to see if the user inputs a quotation mark. If they do, it echos that quotes cannot be inputted.
setlocal enabledelayedexpansion
if not !calcexist!==!calcexist:^"=! set "calcexist="
endlocal & if "%calcexist%"=="" (
echo ERROR - Quotes cannot be entered.
pause
goto calcDoesExist
)
if /i "%calcexist%"=="Y" goto DeleteCalc
if /i "%calcexist%"=="Yes" goto DeleteCalc
if /i "%calcexist%"=="N" goto End
if /i "%calcexist%"=="No" goto End
echo ERROR - Unrecognized input
pause
goto calcDoesExist
:DeleteCalc
cls
echo Deleting...
if not exist C:\calc.exe goto Success
del /f /q C:\calc.exe >nul 2>nul
if not exist C:\calc.exe goto Success
echo Fail!
echo.
echo calc.exe could not be deleted.
echo.
pause
goto End
:Success
echo Deleted!
echo.
echo calc.exe successfully deleted.
echo.
pause
goto End
:End
exit /b
What could I possibly be doing wrong?
Thanks
P.S. I tested this by opening CMD and running the batch script multiple times in there. (but it also doesn't work right when just double clicking it)

Answer 1

If you restructure your script there will be no need for the extended If blocks and therefore no necessity to EnableDelayedExpansion. Also if you use Choice you will not have to do all of the verification of responses.
Example:
#Echo Off
Title My script
Color FC
:Begin
If Exist "C:\calc.exe" GoTo calcDoesExist
Echo(calc.exe doesn't seem to exist.
Choice /M "Attempt deletion anyway"
If ErrorLevel 3 (ClS & GoTo Begin)
If ErrorLevel 2 GoTo End
If ErrorLevel 1 GoTo Success
GoTo End
:calcDoesExist
Echo(calc.exe found.
Choice /M "Delete"
If ErrorLevel 3 (ClS & GoTo calcDoesExist)
If ErrorLevel 2 GoTo End
If ErrorLevel 1 GoTo DeleteCalc
GoTo End
:DeleteCalc
ClS
Echo(Deleting...
Del /A /F "C:\calc.exe">Nul 2>&1
If Not Exist "C:\calc.exe" GoTo Success
Echo(Fail!
Echo(
Echo(calc.exe could not be deleted.
GoTo End
:Success
Echo(
Echo(Deleted!
Echo(
Echo(calc.exe does not exist.
:End
Echo(
Echo(Exiting...
Timeout 3 /NoBreak>Nul
Exit /B