How to open a PDF in Adobe Reader, not Chrome or other browsers.Open Acrobat Reader and select Edit > Preferences.Click Internet in the left panel of the Preferences menu and then select Internet Settings.Select the Programs tab.Click Manage Add-Ons and choose Acrobat Reader in the list of add-ons.More items...
Source : https://www.adobe.com/acrobat/hub/why-pdfs-open-in-browser.html
Your laptop doesn't have a PDF reader installed. Your PDF reader or preferred program is out of date and needs an update. Your PDF application is potentially damaged or needs to be rebooted. The PDF is potentially damaged or tampered with.
Source : https://www.adobe.com/acrobat/hub/why-pdfs-will-not-open.html
Add the app from the app drawer.Swipe from the bottom edge of your screen to the top edge. This will open the app drawer.Tap, hold, and drag the app. You'll see each home screen appear. (You can remove blank home screens if needed.)Move the app to a home screen and release your finger.
Source : https://www.wikihow.com/Add-an-App-Back-to-Home-Screen
How to Change Default App Settings on Android and Fix File Format ProblemsOpen the Settings app.Tap Apps & notifications.Tap Advanced.Tap Default apps.Tap the file type or action you want to change the default app for.Select the app you want to use as the default.Sep 27, 2023
Source : https://www.gizchina.com/2023/09/27/how-to-change-default-app-settings-on-android-solving-file-format-issues/
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Source : https://m.youtube.com/watch?v=5BGVBSAsL1Y
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Source : https://www.youtube.com/watch?v=STNvnM5r6JI