Please, make sure that the program is not blocked by a firewall.
Also, try to disable third-party programs (for example, antivirus) before starting.
Please note that the Windows Operating System has a built-in firewall and is enabled by default.
You can disable the firewall by following these steps:
1. Open the "Start" menu;
2. Open the "Windows Settings";
3. Go to the Windows Firewall menu;
4. Turn it off by selecting the "Turn off" option.
If none of the above helped, then check this article: General Connection Diagnostics.