Cannot install plone 5.2.4 on Windows

Hello everyone, hello @jensens
Thank you for your reply.
I cannot install plone 5.2.4 on Windows 10
I'm trying to install Plone 5.2.4 by following the detailed instructions here: Installers-UnifiedInstaller/windows.rst at master · plone/Installers-UnifiedInstaller · GitHub.
For this, although I had already installed python 3.8.9, I install python 3.8 again from Windows store as advised. Python 3.8 is well installed, pinned to the "start" menu and also present in "path" of "environment variables".

But when I try to install, here is the result:
"Microsoft Windows [version 10.0.19041.867]
(c) 2020 Microsoft Corporation. All rights reserved.

C: \ WINDOWS \ system32> cd \

C: > cd Plone-5.2.4-UnifiedInstaller-1.0

C: \ Plone-5.2.4-UnifiedInstaller-1.0> windows_install.bat standalone --password = XXXXXXXXXX --target = D: \ Plone524 --instance = D: \ Plone524 \ zinstance

C: \ Plone-5.2.4-UnifiedInstaller-1.0> python helper_scripts \ windows_install.py standalone --password = XXXXXXXXXX --target = D: \ Plone524 --instance = D: \ Plone524 \ zinstance
Using target directory D: \ Plone524
Updating pip
Traceback (most recent call last):
File "D: \ Python38 \ lib \ runpy.py", line 194, in _run_module_as_main
return run_code (code, main_globals, None,
File "D: \ Python38 \ lib \ runpy.py", line 87, in run_code
exec (code, run_globals)
File "D: \ Plone524 \ py-3.8.9.final.0 \ Scripts \ pip.exe \ __ main
.py", line 4, in
ModuleNotFoundError: No module named 'pip'
Traceback (most recent call last):
File "D: \ Python38 \ lib \ runpy.py", line 194, in _run_module_as_main
return run_code (code, main_globals, None,
File "D: \ Python38 \ lib \ runpy.py", line 87, in run_code
exec (code, run_globals)
File "D: \ Plone524 \ py-3.8.9.final.0 \ Scripts \ pip.exe \ __ main
.py", line 4, in
ModuleNotFoundError: No module named 'pip'
Installing requirements in virtualenv
Traceback (most recent call last):
File "D: \ Python38 \ lib \ runpy.py", line 194, in _run_module_as_main
return run_code (code, main_globals, None,
File "D: \ Python38 \ lib \ runpy.py", line 87, in run_code
exec (code, run_globals)
File "D: \ Plone524 \ py-3.8.9.final.0 \ Scripts \ pip.exe \ __ main
.py", line 4, in
ModuleNotFoundError: No module named 'pip'
Traceback (most recent call last):
File "D: \ Python38 \ lib \ runpy.py", line 194, in _run_module_as_main
return run_code (code, main_globals, None,
File "D: \ Python38 \ lib \ runpy.py", line 87, in run_code
exec (code, run_globals)
File "D: \ Plone524 \ py-3.8.9.final.0 \ Scripts \ pip.exe \ __ main
.py", line 4, in
ModuleNotFoundError: No module named 'pip'
Traceback (most recent call last):
File "helper_scripts \ windows_install.py", line 141, in
doCommand (
File "helper_scripts \ windows_install.py", line 36, in doCommand
raise AssertionError (
AssertionError: "D: \ Plone524 \ py-3.8.9.final.0 \ Scripts \ pip.exe install -r C: \ Plone-5.2.4-UnifiedInstaller-1.0 \ base_skeleton \ requirements.txt --no-warn- script-location "Failed with error code: 1
C: \ Plone-5.2.4-UnifiedInstaller-1.0> "

Am I missing something?
I specify that I tried to install on another computer with python 3.8.6, still from Windows store, I have the same error message.
Thank you in advance for your help.

Looks like pip is missing from your virtualenv and Python can’t find the package. …I realize that may not be enough to help you…

Thank you @tkimnguyen
Your remark confirms my observation.
Indeed the recommended procedure to install python from Windows Store here is problematic: https: //github.com/plone/Installers-UnifiedInstaller/blob/master/docs/windows.rst.
Unfortunately, by installing python from Windows Store, we do not have the choice of the python installation directory which is installed in this directory:
C: \ Program Files \ WindowsApps \ PythonSoftwareFoundation.Python.3.8_3.8.2544.0_x64__qbz5n2kfra8p0.
However, the "WindowsApps" folder poses permission problems. I have often "access denied" when I put this path in the environment variable.
Otherwise, the full installation from the official package is taken into consideration.
We then have the error message in my previous post that @tkimnguyen commented on.
Installing python from Windows Store results in a reduced installation of python.
My question: why can't we use a complete inattaltion of python 3.8 with a package offered by the python site?
Does somebody have an idea?
Thanks in advance.