[Solved]-'WinError 10013' running Django on Windows

I will take running the server with different port as the answer, although I am not able to see port 8000 is used in stackoverflow suggested commands. Use: python manage.py runserver 8080.

Changing the port worked for me, I was trying to run the django server.
Its not a firewall issue just type port in front of your command

python manage.py runserver 7000

Since changing the port worked for @Kaleab, the problem may have been another process using that port.

I just found a Firefox process with a loopback connection from port 5000 to port 5000 (strange?). Once I closed Firefox, I was able to start my Flask server without that error.

To find out which process is using the port, see here.

run the command with port number 8080 as follows

python manage.py runserver 8080

Just restart your computer and run
python manage.py runserver
or
python manage.py runserver PORT_NUMBER
or
python manage.py runserver 8000
or
python manage.py runserver 8080

It is possible that you have another process running that is using the port. Finding and killing the process will enable you to use the 8000 port.

I got the Error Message due to my Antivirus App (Kaspersky). All i had to do was to assign manage.py in Kasperky < manage programms to trustworthy. I have a foreign version so trustworthy is a literal translation, maybe in the english version it is named different.

I solved this using a different port:

python manage.py runserver 9999

9999 Worked for me