1, Click on the Windows Start button, then type Control Panel into the search box, and then press the Enter key.

2, In Control Panel, click on the System and Security.

3,The System and Security dialog box will be displayed. From the Windows Defender Firewall section, select Allow an app through Windows Firewall option.

4,From the displayed Allowed apps dialog box, click the [Change settings] button.

5, Then click the [Allow another app…] button to add an exception as shown below.

6,The Add an app dialog box will be displayed.

7, Now, browse the C drive of your computer for the Ecsow Dialer folder using path: C:\Program Files (x86)\Ecsow Dialer.

8, From the Ecsow Dialer folder, select the EcsowDialer.exe application file, and click the [Open] button.

9,Click on the [Add] button to add the path of the application.

10, Click the [OK] button to add the EcsowDialer.exe application in the Allowed apps and features list.

Note: Make sure the Domain, Private, and Public check boxes corresponding to the Ecsow Dialer application are checked.