Fix your network settings in Windows 8.1


Lately, when trying to connect to a VPN using my Windows 8.1 machine, I kept bumping into the 619 error. After may tutorials and ideas on how to fix this issue, the following helped me:

  1. open command prompt with administrator privileges;
  2. netsh int ip reset reset.txt
  3. netsh winsock reset
  4. netsh advfirewall reset

Please remember to backup your settings, if you have a custom configuration.

Source:
https://kb.wisc.edu/helpdesk/page.php?id=6653