Sometimes you may have a program that doesn't open how you want it, for example PDFs opening in your web browser instead of a proper PDF reader.
In order to fix this, you simply need to find a file like one that is having the issue, and then follow the below steps.
- Right click the file, and mouse over "Open With", then click "Choose another app" or "Choose default program"
- You will then be given a list of programs that are likely best for this file type.
- Select "Use this app for all" of these files, and then select the program you would like to use, in this example it would be the "Adobe Acrobat Reader".
- If you clicked the "Use this app for all" box it will now open with your desired program in the future.