Q:

PyInstaller WARNING: lib not found

I know this type of question has been asked here before, but I did not find a working solution to it. I have a python file which I want to convert to an exe on Windows 10. I ran pyinstaller --onefile --noconsole myfile.py, and it outputted a lot of warnings:
C:\Users\conne\Desktop\Python >pyinstaller --onefile --noconsole normal.py
277 INFO: PyInstaller: 3.3.1
277 INFO: Python: 3.6.2
278 INFO: Platform: Windows-10-10.0.15063-SP0
279 INFO: wrote C:\Users\conne\Desktop\Python\normal.spec
280 INFO: UPX is not available.
283 INFO: Extending PYTHONPATH with paths
['C:\\Users\\conne\\Desktop\\python',
 'C:\\Users\\conne\\Desktop\\python']
283 INFO: checking Analysis
284 INFO: Building Analysis because out00-Analysis.toc is non existent
284 INFO: Initializing module dependency graph...
286 INFO: Initializing module graph hooks...
289 INFO: Analyzing base_library.zip ...
5055 INFO: running Analysis out00-Analysis.toc
5058 INFO: Adding Microsoft.Windows.Common-Controls to dependent assemblies of final executable
  required by c:\users\conne\appdata\local\programs\python\python36\python.exe
5145 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python.exe
5225 WARNING: lib not found: api-ms-win-crt-math-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python.exe
5298 WARNING: lib not found: api-ms-win-crt-heap-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python.exe
5371 WARNING: lib not found: api-ms-win-crt-locale-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python.exe
5442 WARNING: lib not found: api-ms-win-crt-stdio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python.exe
5526 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\VCRUNTIME140.dll
5598 WARNING: lib not found: api-ms-win-crt-string-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\VCRUNTIME140.dll
5669 WARNING: lib not found: api-ms-win-crt-heap-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\VCRUNTIME140.dll
5753 WARNING: lib not found: api-ms-win-crt-convert-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\VCRUNTIME140.dll
5840 WARNING: lib not found: api-ms-win-crt-stdio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\VCRUNTIME140.dll
6061 WARNING: lib not found: api-ms-win-crt-time-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6134 WARNING: lib not found: api-ms-win-crt-string-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6208 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6282 WARNING: lib not found: api-ms-win-crt-conio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6354 WARNING: lib not found: api-ms-win-crt-environment-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6430 WARNING: lib not found: api-ms-win-crt-math-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6503 WARNING: lib not found: api-ms-win-crt-heap-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6576 WARNING: lib not found: api-ms-win-crt-convert-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6651 WARNING: lib not found: api-ms-win-crt-locale-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6725 WARNING: lib not found: api-ms-win-crt-process-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6798 WARNING: lib not found: api-ms-win-crt-stdio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6879 WARNING: lib not found: api-ms-win-crt-filesystem-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\python36.dll
6882 INFO: Caching module hooks...
6892 INFO: Analyzing C:\Users\conne\Desktop\python meterpreter\normal.py
6898 INFO: Loading module hooks...
6899 INFO: Loading module hook "hook-encodings.py"...
7055 INFO: Loading module hook "hook-pydoc.py"...
7057 INFO: Loading module hook "hook-xml.py"...
7351 INFO: Looking for ctypes DLLs
7351 INFO: Analyzing run-time hooks ...
7360 INFO: Looking for dynamic libraries
7439 WARNING: lib not found: api-ms-win-crt-time-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
7515 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
7589 WARNING: lib not found: api-ms-win-crt-string-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
7660 WARNING: lib not found: api-ms-win-crt-conio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
7731 WARNING: lib not found: api-ms-win-crt-environment-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
7813 WARNING: lib not found: api-ms-win-crt-utility-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
7895 WARNING: lib not found: api-ms-win-crt-heap-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
7968 WARNING: lib not found: api-ms-win-crt-convert-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
8051 WARNING: lib not found: api-ms-win-crt-stdio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
8133 WARNING: lib not found: api-ms-win-crt-filesystem-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_ssl.pyd
8213 WARNING: lib not found: api-ms-win-crt-string-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\unicodedata.pyd
8286 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\unicodedata.pyd
8361 WARNING: lib not found: api-ms-win-crt-stdio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\unicodedata.pyd
8440 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\pyexpat.pyd
8512 WARNING: lib not found: api-ms-win-crt-environment-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\pyexpat.pyd
8585 WARNING: lib not found: api-ms-win-crt-heap-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\pyexpat.pyd
8658 WARNING: lib not found: api-ms-win-crt-stdio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\pyexpat.pyd
8741 WARNING: lib not found: api-ms-win-crt-time-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_hashlib.pyd
8815 WARNING: lib not found: api-ms-win-crt-string-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_hashlib.pyd
8887 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_hashlib.pyd
8958 WARNING: lib not found: api-ms-win-crt-conio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_hashlib.pyd
9032 WARNING: lib not found: api-ms-win-crt-environment-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_hashlib.pyd
9116 WARNING: lib not found: api-ms-win-crt-utility-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_hashlib.pyd
9194 WARNING: lib not found: api-ms-win-crt-stdio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_hashlib.pyd
9271 WARNING: lib not found: api-ms-win-crt-heap-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_hashlib.pyd
9344 WARNING: lib not found: api-ms-win-crt-convert-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_hashlib.pyd
9428 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_bz2.pyd
9501 WARNING: lib not found: api-ms-win-crt-string-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_bz2.pyd
9580 WARNING: lib not found: api-ms-win-crt-math-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_bz2.pyd
9651 WARNING: lib not found: api-ms-win-crt-heap-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_bz2.pyd
9723 WARNING: lib not found: api-ms-win-crt-stdio-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_bz2.pyd
9801 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_lzma.pyd
9874 WARNING: lib not found: api-ms-win-crt-heap-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_lzma.pyd
9959 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_socket.pyd
10030 WARNING: lib not found: api-ms-win-crt-string-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\_socket.pyd
10115 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\conne\appdata\local\programs\python\python36\DLLs\select.pyd
10123 INFO: Looking for eggs
10123 INFO: Using Python library c:\users\conne\appdata\local\programs\python\python36\python36.dll
10124 INFO: Found binding redirects:
[]
10128 INFO: Warnings written to C:\Users\conne\Desktop\python\build\normal\warnnormal.txt
10196 INFO: Graph cross-reference written to C:\Users\conne\Desktop\python\build\normal\xref-normal.html
10212 INFO: checking PYZ
10212 INFO: Building PYZ because out00-PYZ.toc is non existent
10213 INFO: Building PYZ (ZlibArchive) C:\Users\conne\Desktop\python\build\normal\out00-PYZ.pyz
10948 INFO: Building PYZ (ZlibArchive) C:\Users\conne\Desktop\python\build\normal\out00-PYZ.pyz completed successfully.
10958 INFO: checking PKG
10958 INFO: Building PKG because out00-PKG.toc is non existent
10959 INFO: Building PKG (CArchive) out00-PKG.pkg
12884 INFO: Building PKG (CArchive) out00-PKG.pkg completed successfully.
12887 INFO: Bootloader c:\users\conne\appdata\local\programs\python\python36\lib\site-packages\PyInstaller\bootloader\Windows-64bit\runw.exe
12887 INFO: checking EXE
12888 INFO: Building EXE because out00-EXE.toc is non existent
12888 INFO: Building EXE from out00-EXE.toc
12916 INFO: Appending archive to EXE C:\Users\conne\Desktop\python meterpreter\dist\normal.exe
13011 INFO: Building EXE from out00-EXE.toc completed successfully.

As you can see the exe is created successfully, but it doesn't work as it should when running it.
EDIT:
I ran it with debug enabled and apparently it can't import ctypes, it throws a name error. It only does this when running with pyinstaller, when running as a .py file it works fine.

A:

I found the DLL's in system32/downlevel and syswow64/downlevel and copied all of them to the respective parent folders (system32 and syswow64). Something that Ritesh Singh's command will do. Try a restart after copying if it still does not work.

A:

26095 WARNING: lib not found: api-ms-win-crt-runtime-l1-1-0.dll dependency of c:\users\user\appdata\local\programs\python\python36-32\DLLs\select.pyd

Search in C: drive for dll and set the path in pyinstaller command. The below command fixed the above pyinstaller error in windows 10:
pyinstaller --paths C:\Windows\WinSxS\x86_microsoft-windows-m..namespace-downlevel_31bf3856ad364e35_10.0.17134.1_none_50c6cb8431e7428f hello.py

A:

I just added the path in the environmental variable, it worked for me.
C:\Program Files (x86)\Windows Kits\10\Redist\ucrt\DLLs\x64
(or)
C:\Program Files (x86)\Windows Kits\10\Redist\ucrt\DLLs\x86

