Java 8 Runtime Install, Error Code 1618

I faced error code 1618 which practically means that another Windows Installer (msiexec.exe) instance is already running in the background.

Now I decided to write some exceptions lines to save the same CPU resources and not waste unnecessary executions.

So..

To skip java installation if the windows installer process is already doing some other things, I use:

setlocal EnableDelayedExpansion

tasklist | findstr "msiexec"
if !errorlevel!==0 echo another installation is in progress
if !errorlevel!==0 goto exit

.. executing installation

:exit

endlocal

For particular java version, I grow the program with some detection rule:

setlocal EnableDelayedExpansion
set sw=HKLM\SOFTWARE
set u=Microsoft\Windows\CurrentVersion\Uninstall
set k={26A24AE4-039D-4CA4-87B4-2F32180131F0}

if not "%ProgramFiles(x86)%"=="" set x=Wow6432Node\

reg query "%sw%\%x%%u%\%k%" > nul 2>&1
if not !errorlevel!==0 (

.. do some installation

) else echo %k% already found

endlocal

{26A24AE4-039D-4CA4-87B4-2F32180131F0} stands for JRE version 8u131

And now the full code: