On Sun, May 09, 2021 at 10:04:29PM +0000, Mohamed wrote:

> As I mentioned, It seems that the recent update of Windows has affected Tkinter, 
> so that mainloop is not working after the first time

That isn't what it looks like to me. If updating Windows had affected 
Tkinter, IDLE would no longer work and there would be thousands of 
people affected. I see no sign that this is the case:

https://duckduckgo.com/?q=latest+update+of+windows+breaks+tkinter

It would be very, very suprising if you were the only person who has 
noticed that a Windows update broke Tkinter.

Mohamed, you said that you had done an investigation which showed memory 
corruption. What is your evidence for memory corruption?

So far there is no evidence for a bug in Tkinter or Python. This is not 
a help desk. There are many forums where you can get help debugging your 
program, you should create a minimal example and ask for help at

https://www.reddit.com/r/learnpython/

http://mail.python.org/mailman/listinfo/python-list

news:comp.lang.python

https://discuss.python.org/c/users/7

https://www.python.org/community/irc/

No matter which forum you go to, you will be asked for a minimal example 
demonstrating the problem:

http://www.sscce.org/

https://stackoverflow.com/help/minimal-reproducible-example

https://ericlippert.com/2014/03/05/how-to-debug-small-programs/

https://medium.com/swlh/how-to-ask-smart-questions-d02f053a02ac

http://www.catb.org/esr/faqs/smart-questions.html

Note that a minimal program **MUST** be runnable. There is no point just 
deleting lines of code and replacing them with "...", because the code 
won't run.