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Pyinstaller fails to find kernel32 dll

Currently trying to build a exe using PyInstaller. The installation goes fine, although when trying to run the exe an exception occurs
Exception ignored in: <function Library.__del__ at 0x000002126637F160>
Traceback (most recent call last):
File "C:\Users\blah\AppData\Local\Programs\Python\Python39\lib\site-packages\pylink\library.py", line 272, in __del__
File "C:\Users\blah\AppData\Local\Programs\Python\Python39\lib\site-packages\pylink\library.py", line 390, in unload
File "C:\Users\blah\AppData\Local\Programs\Python\Python39\lib\ctypes\__init__.py", line 444, in __getattr__
File "PyInstaller\loader\pyimod04_ctypes.py", line 79, in __init__
pyimod04_ctypes.install.<locals>.PyInstallerImportError: Failed to load dynlib/dll 'kernel32'. Most likely this dynlib/dll was not found when the application was frozen.
I've followed the lead on some other posts and ensured the Visual C++ Redistributables are installed and also included --hidden-import ctypes in the build to no avail.
Building on Windows 10 - Python 3.9 - PyInstaller 5.0.1
Any help would be great!

Taken from the comments on the original answer. Quote stevod:
I ended up finding the problem, our company anti virus wouldn't let the bootloader access the required files, so we had to rebuild the bootloader manually and then it worked!
The same worked also for me.

Error running fully_connected_feed.py

When I run the fully_connected_feed.py code:
https://github.com/tensorflow/tensorflow/blob/master/tensorflow/examples/tutorials/mnist/fully_connected_feed.py
I get an error:
Traceback (most recent call last):
File "C:/Users/AppData/Local/Continuum/Anaconda3/Lib/site-packages/tensorflow/examples/tutorials/mnist/fully_connected_feed.py", line 277, in <module>
tf.app.run(main=main, argv=[sys.argv[0]] + unparsed)
File "C:\Users\AppData\Local\Continuum\Anaconda3\lib\site-packages\tensorflow\python\platform\app.py", line 43, in run
sys.exit(main(sys.argv[:1] + flags_passthrough))
File "C:/Users/AppData/Local/Continuum/Anaconda3/Lib/site-packages/tensorflow/examples/tutorials/mnist/fully_connected_feed.py", line 222, in main
run_training()
File "C:/Users/AppData/Local/Continuum/Anaconda3/Lib/site-packages/tensorflow/examples/tutorials/mnist/fully_connected_feed.py", line 120, in run_training
data_sets = input_data.read_data_sets(FLAGS.input_data_dir, FLAGS.fake_data)
File "C:\Users\AppData\Local\Continuum\Anaconda3\lib\site-packages\tensorflow\contrib\learn\python\learn\datasets\mnist.py", line 211, in read_data_sets
SOURCE_URL + TRAIN_IMAGES)
File "C:\Users\AppData\Local\Continuum\Anaconda3\lib\site-packages\tensorflow\contrib\learn\python\learn\datasets\base.py", line 142, in maybe_download
gfile.Copy(temp_file_name, filepath)
File "C:\Users\AppData\Local\Continuum\Anaconda3\lib\site-packages\tensorflow\python\lib\io\file_io.py", line 316, in copy
compat.as_bytes(oldpath), compat.as_bytes(newpath), overwrite, status)
File "C:\Users\AppData\Local\Continuum\Anaconda3\lib\contextlib.py", line 66, in __exit__
next(self.gen)
File "C:\Users\AppData\Local\Continuum\Anaconda3\lib\site-packages\tensorflow\python\framework\errors_impl.py", line 469, in raise_exception_on_not_ok_status
pywrap_tensorflow.TF_GetCode(status))
tensorflow.python.framework.errors_impl.OutOfRangeError: Read fewer bytes than requested
How do I resolve this issue?

After doing the following, I was able to run the script without errors. The key for getting it to work for me, was the version of tensorflow installed has to match the tutorial code, otherwise there were exceptions. Although, I got a different exception than you, at first.
After installing tensorflow, check version. Details of this step may be different if you installed it pip or some other method:
$ conda list tensorflow
# packages in environment at /Users/agr/miniconda3/envs/tensorflow:
#
tensorflow 0.11.0 py35_0 conda-forge
Clone the git repo
$ git clone https://github.com/tensorflow/tensorflow.git
Inspect the tags available and checkout the release matching your install:
$ cd tensorflow
$ git tag -l -n1
...
$ git checkout v0.11.0
Run script!
$ cd examples/tutorials/mnist/
$ python fully_connected_feed.py
The key point being, run the script from here, not from the link you posted in the original question.

TL; DR
Something else is altering your files as you create them. Find the process and stop it.
Research
I've just run the demo with Windows 10, Python 3.5, tensorflow 0.12.0 with no errors. It is therefore something about your environment.
Looking at the actual line of the error, you are failing to read the required number of bytes from the open file. Going further up the stack you can see that CopyFile is actually trying to read all the bytes of a file into a string in this function. This starts by finding out the current file size and then trying to read all the bytes.
The problem is that the file size at the start of this process doesn't match the size by the end of the copy. In other words, something else has altered your file.
What next?
Your best bet is to try to find out what else is accessing your file. I suggest you use the techniques explained here to see what else has the file open as you are running the copy.

I encountered the same problem on Windows 2012 Server.
As suggested in the previous post, I downloaded and launched Process Monitor, then set the filter: "Path contains mnist" see the image. The datasets were downloaded and unpacked correctly, while running code both from Spyder and Jupyter.
I suspect that there is a race condition in the library code, i.e. missing synchronization between downloading and unpacking operations. As Process Monitor introduced additional delays, the datasets were sucessfully downloaded before the next operation started, hence the hazardous behavior was not observed.

Unable to run Python interpreter in terminal, through Anaconda3

When I try the "python" or "python3" command to run the interpreter, this is the error am getting.
[sidgupta234#sidgupta234-Lenovo-G580 Downloads]$ python
Failed to import the site module
Traceback (most recent call last):
File "/usr/lib/python3.5/site.py", line 580, in <module>
main()
File "/usr/lib/python3.5/site.py", line 566, in main
known_paths = addusersitepackages(known_paths)
File "/usr/lib/python3.5/site.py", line 287, in addusersitepackages
user_site = getusersitepackages()
File "/usr/lib/python3.5/site.py", line 263, in getusersitepackages
user_base = getuserbase() # this will also set USER_BASE
File "/usr/lib/python3.5/site.py", line 253, in getuserbase
USER_BASE = get_config_var('userbase')
File "/usr/lib/python3.5/sysconfig.py", line 595, in get_config_var
return get_config_vars().get(name)
File "/usr/lib/python3.5/sysconfig.py", line 538, in get_config_vars
_init_posix(_CONFIG_VARS)
File "/usr/lib/python3.5/sysconfig.py", line 410, in _init_posix
from _sysconfigdata import build_time_vars
File "/usr/lib/python3.5/_sysconfigdata.py", line 6, in <module>
from _sysconfigdata_m import *
ImportError: No module named '_sysconfigdata_m'
Output to which python
[sidgupta234#sidgupta234-Lenovo-G580 Downloads]$ which python
/usr/bin/python
Output to python -V
[sidgupta234#sidgupta234-Lenovo-G580 Downloads]$ python -V
Python 3.5.2 :: Continuum Analytics, Inc.
Could you tell me the reason of this error and how can I remove it?
I found this link while looking for the solution, but it didnt make any difference.

I guess configuring_apache_django_anaconda is relevant, if you look at the troubleshooting section.
This means that apache is using Python 2 instead of Python 3 to run a program that is designed for Python 3 only, and fails because Python 2 does not have the _sysconfigdata_m module. The solution is to add the following file to your apache envvar file (/etc/apache2/envvar):
export PATH=/opt/anaconda3/bin:$PATH
So maybe check which version of python anaconda is running?
Also these two might be related:Linux - Weird Python Output
ubuntu anaconda suggested fix
I would suggest you print your PATH variable to see if you have several python3 entries in there, and try to specify explicity which one to run.

That is an strange situation you have gotten yourself into, and if Continuum had any part of it (where I'm an engineer) we'd like to understand what we did that led to it so we can avoid it in the future.
Where did you try installing Anaconda? Did you set any environment variables?
The "easiest-to-resolve" cause of this problem is that you have set some environment variables that are mixing system Python libraries and Anaconda Python libraries. You should look at the output of:
env | grep -i anaconda
and see if anything comes up that specifies a path to Anaconda. The only one that should appear is an entry in PATH. If there are any LD_LIBRARY_PATH, PYTHONPATH, PYTHONHOME or similar environment variables that point to Anaconda then that is going to be a problem.
The only other thing I can think of is that you specified /usr as the install path for Anaconda. If that is the case you are probably in for a world of pain: you have just replaced your system Python with Anaconda. You should investigate how to force-reinstall whichever Python package comes with your *nix distribution, but even that might be tricky: tools such as yum are written in Python and will need a working system Python interpreter to work. But RPM is binary (if you're on a RedHat or derivative distro), so maybe you can wget or curl the necessary system Python packages and force-install them to try and fix things.
Let us know if that is enough information for you to fix things or at least identify the source of the problem a little better.

Ipython installation on 3.3 x64 errors

I don't have experience in downloading libraries, so any help is appreciated. I've got a fresh install of Python3.3 and am trying to get IPython for 64bit Windows 7. The IPython .exe installer ran fine and completed normally, but I can't access the program. I looked through their documentation, and tried the commands there, but
$ python setup.py install
returns invalid syntax, highlighting "setup". I thought the fix might be in the distribute library mentioned on the page, so I went to go try and get that first. However, using the script from distribute's install page revealed it's own errors, namely
Traceback (most recent call last):
File "C:\Python33\distribute_setup.py", line 541, in <module>
sys.exit(main())
File "C:\Python33\distribute_setup.py", line 537, in main
tarball = download_setuptools(download_base=options.download_base)
File "C:\Python33\distribute_setup.py", line 200, in download_setuptools
log.warn("Downloading %s", url)
File "C:\Python33\lib\distutils\log.py", line 47, in warn
self._log(WARN, msg, args)
File "C:\Python33\lib\distutils\log.py", line 30, in _log
if stream.errors == 'strict':
AttributeError: errors
I've been at it for a couple hours now, and I'm fresh out of ideas. What next?

It looks like you ran into Python bug 12967. You need to run distribute_setup.py outside of IDLE (i.e. in a command prompt).

building and running mitmproxy in python windows: possible at all?

I was attempting to install mitmproxy and run the "mitmproxy" and "mitmdump" from the Scripts folder.
However, I get tons of errors that a lot of modules are not found.
From the error messages I tried to install all the missing modules
Pry
PyOpenSSL
Pyasn
urwid
I stopped after that as I am not sure this will lead me to success.
a) is running and building mitmproxy on windows possible at all?
b) how can I get all the dependant modules and install them?
I reached the point where the package "urwid" is needed. However that fails with: "Unable to find vcvarsall.bat"
EDIT: it seems running mitmproxy is not really possible as the urwid package provides the terminal GUI which does not work for windows. However, I only need mitmdump. When I try running it I get:
C:\Python27\Scripts>C:\Python27\python.exe mitmdump -w out.txt
Traceback (most recent call last): File "mitmdump", line 41, in <module>
proxyconfig = proxy.process_proxy_options(parser, options)
File "C:\Python27\lib\site-packages\libmproxy\proxy.py", line 527, in process_
proxy_options certutils.dummy_ca(cacert)
File "C:\Python27\lib\site-packages\libmproxy\certutils.py", line 44, in dummy_castdin=subprocess.PIPE
File "C:\Python27\lib\subprocess.py", line 493, in call
return Popen(*popenargs, **kwargs).wait()
File "C:\Python27\lib\subprocess.py", line 679, in __init__errread, errwrite)
File "C:\Python27\lib\subprocess.py", line 893, in _execute_childstartupinfo)
WindowsError: [Error 2] System can not find file
C:\Python27\Scripts>
Maybe it can not find this certificate dummy file that is created. However, it didnt create the "mitmproxy-ca-cert.p12"
Help needed

mitmproxy's console interface (ncurses) doesn't run on Windows, although you can get it running under Cygwin. If you don't need an interactive user interface for your specific task, mitmdump (comes with mitmproxy) gets the job done as well. If you want to try out some alpha-quality software, you can also try mitmproxy's mitmweb and open the webinterface at http://localhost:8081/.