How to lock the default application Zhihu?

The traditional way to modify the default program is to open the control panel-Programs-Set Default Program, select the program to be set as the default on the left, click "Set this program as the default program" in the lower right corner, and then click OK. Press the "win" key (the key between ctrl and alt) under win 10, and a list of programs will appear on the left. Find the default program, repeat the above step 2 or directly search for "Default Program" in the search box on the left side of the taskbar to open it.