REM JK-Windows.Old Deleter Version 1.0.181109 by jkadeesh
@echo off
setlocal
Title Windows.Old Deleter
set BAT_HOME=%~dp0
set BAT_NAME=%~s0
set BATFILE=%~nx0
set DRVLET=%~d0

if "%1"=="" goto interactive
REM Flash related lines are meant for deleting Flash specific .OCX files which cannot be easily deleted
if exist %1\Windows\System32\Macromed\Flash CD /D %1\Windows\System32\Macromed\Flash && cacls *.* /P Everyone:F
cd /d %DRVLET%
takeown /f %1 /R /d y
icacls %1 /grant administrators:F /t
rd /s /q %1
goto end

:interactive
cls
cd /d %DRVLET%\
IF EXIST %DRVLET%\Windows.old ECHO. && ECHO Found %DRVLET%\Windows.old && GOTO Auto
IF NOT EXIST %DRVLET%\Windows.old ECHO. && ECHO NOT FOUND %DRVLET%\Windows.old && ECHO.

echo Enter folder name [with complete path] which needs to be deleted:   do i enter \c: \windows.old here in script??
echo.
echo To exit type "x" and press Enter key
echo.
echo.
set /p user=Folder Name[with path]: I’m confused about what to enter here
if "%user%"=="x" goto end

if exist %user%\Windows\System32\Macromed\Flash CD /D %user%\Windows\System32\Macromed\Flash && cacls *.* /P Everyone:F
cd /d %DRVLET%\
takeown /f %user% /R /d y
icacls %user% /grant administrators:F /t
rd /s /q %user%

if not "%user%"=="x" goto interactive
goto end

:Auto
cls
ECHO.
cd /d %DRVLET%\
set user=Windows.old
if exist %DRVLET%\%user%\Windows\System32\Macromed\Flash CD /D %DRVLET%\%user%\Windows\System32\Macromed\Flash && cacls *.* /P Everyone:F
cd /d %DRVLET%\
takeown /f %user% /R /d y
icacls %user% /grant administrators:F /t
rd /s /q %user%

goto end
:end
ECHO.
ECHO Exiting...
ECHO.
pause

How to use the above code?
0. Disable User Access control [temporarily] - Once this task of deleting files / folders is completed, 
you may want to re-enable User Access Control. To disable UAC, 
go to Control Panel > User Accounts > Turn User Account Control on or off ; then uncheck the 
option "Use User Account Control (UAC) to help protect your computer" and click OK. Then restart the computer.
1. Copy/paste the code to Notepad
2. Save the file with the file name as: DeleteFiles.bat to C:\ drive [any location is ok - you need 
to go to the relevant location using the command line in step: 4]
Note that the 'Save as type' should be selected as "All Files (*.*)" before you click the Save button.
3. Go to Command prompt
4. Type CD \  to go to C:\
5. Type DeleteFiles foldername and then press Enter key
By default, the folder name is C:\Windows.old.
If the Windows.old folder resides in D:\ [or a different drive], then enter the drive letter accordingly 
along with the folder name.
6. Then you will notice a lot of operation in the command window and the script will end with 
"Exiting..." . Press any key to exit the script.
Then you will find Windows.old folder is completely removed - Note that with this method the 
contents of Windows.old folder will not won't be sent to the Recycle bin.
DeleteFiles.bat can be run without supplying the folder name also - in that scenario, it will 
consider Windows.old folder present in the current drive from which you run the batch file