To fix event id 4027 error, can try the following resolutions:
Check if there is some #Windows #firewall rule blocking certain port.
Check if you’re having trouble allowing other computers to communicate with your #computer through Windows Firewall, and you can try using the Incoming Connections troubleshooter to automatically find and fix some common #problems.
In Windows7, Open the Incoming Connections troubleshooter by clicking the Start button Picture of the Start button, and then clicking Control Panel. In the search box, type troubleshooter, and then click Troubleshooting. Click View all, and then click Incoming Connections.
Check if there is some service which doesn’t work.
More info >>