In Windows 10, when you double click on a PDF file, it will automatically open in the Microsoft Edge browser. Though it is a nice feature, as a single application is doing the work of two. Like earlier, you don’t need to install and set up an additional third-party PDF reader software. But, it is a normal PDF reader, which doesn’t have more capabilities. Many of you want to use a feature-rich application as your default PDF viewer. There are plenty of a PDF reader applications to choose from; you can select the one you like and set it as your default PDF viewer. Here is how to change and set the default PDF Viewer in Windows 10 PC.
Source: How to Change and Set the Default PDF Viewer in Windows 10 PC