How does Win10 remove the exclamation point on the notification area network icon

Like Win7/Win8.1 and other systems, Win10 automatically monitors the availability of the network and displays a yellow exclamation point on the network icon in the notification area in the lower right corner when the network cable is connected but the network is unavailable. As shown below: When

But sometimes when we use some special network, such as using a special filter proxy or connection, even under normal circumstances the network, there is still an exclamation point may be displayed And can't be eliminated, you can try the following method to remove this mark:
• Open the run by Win+R, enter regedit and press Enter to open the registry editor;
Note: Modifying the registry is risky. The registry can be backed up using the cleanup function in the cleanup optimization software before the operation.
• Navigate to the following registry location:
HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindowsNetwork Connections
• create a new DWORD value named NC_DoNotShowLocalOnlyIcon on the right side, double-click to modify the value to 1;

• Close Sign up table restart Explorer (there may need to reboot the system), after an exclamation mark on the network icon will disappear, as shown below: