From the options in Control Panel window select ‘Default Programs’.If there are some errors while viewing PDF in Microsoft Edge then change the default PDF settings How To Protect PDF Files With Password For Free Here are some techniques to open PDF files in Microsoft Edge browser Errors in the Edge browser prevent PDF from opening. If there is some problem in the Edge browser, then it becomes difficult to view PDF files. Even if other PDF readers are installed on the system, Windows 10 uses Microsoft Edge. But Windows 10 user, gets the PDF file in Microsoft Edge. In Windows 7/ 8/ 8.1/ XP when the PDF gets downloaded it opens automatically. So, the question came about how to open a PDF in Microsoft Edge. Earlier, windows used other applications like Adobe Reader, Adobe Acrobat for PDF file management but if certain changes are made then Microsoft Edge couldn’t open PDF. But it has made certain changes like opening PDF files in new browser Edge. Users can download the apps from Window store and use them for various tasks. The latest version of the Windows Operating System from Microsoft is fast, secure, flexible, and has many new applications. Windows 10 comes up with new features focusing more on security.