you can use this command line syntax executing command prompt with Administrative rights:
ipconfig /flushdns
netsh winsock reset
netsh winsock reset proxy
https://support.microsoft.com/en-us/help/10741/windows-10-fix-network-connection-issues
<------------>------------>
Using network reset should be the last step you try. Consider using it if the steps above don’t help to get you connected.
This can help solve connection problems you might have after upgrading from a previous version of Windows to Windows 10, as well as fix problems where you can connect to the Internet but not to shared network drives. It removes any network adapters you have installed and the settings for them. After your PC restarts, any network adapters are reinstalled, and the settings for them are set to the defaults.
Note
To use network reset, your PC must be running Windows 10 Version 1607 or later. To see which version of Windows 10 your device is currently running, select the Start button, then select Settings > System > About.
- Select the Start button, then select Settings > Network & Internet > Status > Network reset.
- On the Network reset screen, select Reset now > Yes to confirm.Wait for your PC to restart and see if that fixes the problem.
Notes
After using network reset, you might need to reinstall and set up other networking software you might be using, such as VPN client software or virtual switches from Hyper‑V (if you're using that or other network virtualization software).
Network reset might set each one of your known network connections to a public network mode. In a public network mode, your PC is not discoverable to other PCs and devices on the network, which can help make your PC more secure. However, if your PC is part of a homegroup or used for file or printer sharing, you’ll need to make your PC discoverable again. To do this, go to Settings > Network & Internet > Wi-Fi . On the Wi-Fi screen, select Manage known networks > the network connection you want to change > Properties, and then turn on the switch under Make this PC discoverable.