Pythonw.exe version=36+ always failed and report appcrash report with ucrtbase.dll

Question

ENV=win7x64

20GB free disk space on each disks.

Used to work with python3.5.2. Python3.5 from official release, Python 3.5.2 from Anaconda3-4.2.0-Windows-x86_64. Both of them work well.

MSVC 2005-2022 runtime x86 x64 installed.

Try to upgrade python3.8(3.6+) all failed.

1. Install python3.6+ from official release. Python.exe worked, but pythonw.exe and idle failed without any error report.

2. Install python3.6-3.8 from Anaconda3-2018-2021. Conda(python3.6-3.7)will fail with APPCRASH REPORT pythonw.exe ucrtbase.DLL below.

pythonw.exe 3.6.5150.1013 5abd3212 ucrtbase.DLL 10.0.16299.15 70f70cc4 40000015 000000000006b71f 6.1.7601.2.1.0.256.1 2052 7c91 7c91ffc054a06a19bae511ac86fd4989 1e3a 1e3a1cfe3de7d661be48e9d60cfb8b11

Conda(python 3.7-3.8) will not show any report, but find entry_point ERROR below.

Extract: anaconda-2021.05-py38_0.tar.bz2
  0%|          | 0/339 [00:00<?, ?it/s]
  File "entry_point.py", line 69, in <module>
  File "concurrent\futures\process.py", line 674, in map
  File "concurrent\futures\_base.py", line 600, in map
  File "concurrent\futures\_base.py", line 600, in <listcomp>
  File "concurrent\futures\process.py", line 645, in submit
  File "concurrent\futures\process.py", line 584, in _start_queue_management_thread
  File "concurrent\futures\process.py", line 608, in _adjust_process_count
  File "multiprocessing\process.py", line 121, in start
  File "multiprocessing\context.py", line 327, in _Popen
  File "Lib\site-packages\PyInstaller\loader\rthooks\pyi_rth_multiprocessing.py", line 83, in __init__
  File "multiprocessing\popen_spawn_win32.py", line 73, in __init__
FileNotFoundError: [WinError 2] 
[2964] Failed to execute script entry_point
Collecting package metadata (current_repodata.json): ...working... done

Note that pythonw.exe(py35) icon is different from pythonw.exe(py36+) icon. I guess it might be caused by runtime? How to fix this problem?

Ok. Bad news. Still stucked here.

What I have tried:

1. Win7x64 Windows6.1-KB2999226-x64 installed.
2. HKLC & HKCU /SOFTWARE/PYTHON deleted.
3. Anything related in SYS.Path and User.Path cleared. path=%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;D:\PostgreSQL\pg10\bin;C:\Program Files (x86)\Google\Chrome\Application No PYTHONPATH&PYTHONHOME . No user PATH.
4. JDK JAVAHOME deleted.
5. anaconda clean --yes.
6. MSVC runtime 2008-2022 all installed.
7. CLose all antivirus soft.
8. Restart Computer.

Problem is still there.

1. Anaconda3-4.2.0-Windows-x86_64.exe installed, python ipython idle spyder jupyter work well.(py 3.5.2)

2. Clean Anaconda3, uninstall Anaconda3.

3.For Anaconda3-2019.07-Windows-x86_64.exe installation(reg anaconda3 as system python3.7 by default), during almost the end below.

DEBUG menuinst_win32:create(324): Shortcut cmd is d:\ProgramData\Anaconda3\python.exe, args are ['d:\\ProgramData\\Anaconda3\\cwp.py', 'd:\\ProgramData\\Anaconda3', 'd:\\ProgramData\\Anaconda3\\python.exe', 'd:\\ProgramData\\Anaconda3\\Scripts\\jupyter-notebook-script.py', '"%USERPROFILE%/"']

I got a CRASHreport below.

APPCRASH
python.exe
3.7.3150.1013
5cc0c771
ucrtbase.DLL
10.0.17134.12
587decd7
40000015
000000000006e76f
6.1.7601.2.1.0.256.1
2052
99f9
99f9768885038458efd17b3ff3bc92c8
eff0
eff0e13a5c9d3da6d6b491ef4a5a8088

Close the crash report window then.

WARNING conda.core.envs_manager:register_env(46): Unable to register environment. Path not writable or missing.

Start up menu created, run python activate powershell got fatal error.

initfsencoding... no module named 'encoding'

4. For Anaconda3-2021.05-Windows-x86_64.exe, installation will return file not found winerror during entry_point.py like below.

Extract: anaconda-2021.05-py38_0.tar.bz2
  0%|          | 0/339 [00:00<?, ?it/s]
  File "entry_point.py", line 69, in <module>
  File "concurrent\futures\process.py", line 674, in map
  File "concurrent\futures\_base.py", line 600, in map
  File "concurrent\futures\_base.py", line 600, in <listcomp>
  File "concurrent\futures\process.py", line 645, in submit
  File "concurrent\futures\process.py", line 584, in _start_queue_management_thread
  File "concurrent\futures\process.py", line 608, in _adjust_process_count
  File "multiprocessing\process.py", line 121, in start
  File "multiprocessing\context.py", line 327, in _Popen
  File "Lib\site-packages\PyInstaller\loader\rthooks\pyi_rth_multiprocessing.py", line 83, in __init__
  File "multiprocessing\popen_spawn_win32.py", line 73, in __init__
FileNotFoundError: [WinError 2] 系统找不到指定的文件。
[4780] Failed to execute script entry_point
Collecting package metadata (current_repodata.json): ...working... done
Solving environment: ...working... failed with initial frozen solve. Retrying with flexible solve.
Collecting package metadata (repodata.json): ...working... done
Solving environment: ...working... failed with initial frozen solve. Retrying with flexible solve.

No start up menu created.

It seems that only Anaconda3-4.2.0(py3.5.2) can work on this computer. If I try official release installation. All python3.5-3.8 can be installed, and All python(python.exe) in cmd can be running. But only start menuIDLE(py35 pythonw.exe) will work. Click any IDLEpy36+(pythonw.exe) will not got any error message or new window.

Answer 1

My final decision is to reinstall the win7 os. Yes it's done. No need to struggle to find solutions any more.