When opening a file in Windows 10, it will be opened using the program that is set as the default program for that file type. Depending on the type of file, you may wish to change the default program that is used to open that file. For example, the default program used to open PDF files in Windows 10 is Microsoft Edge but if you have Adobe Acrobat or another PDF reader installed you may want to change that to the default program.
1. Open the Start menu and click on the Settings icon.
2. In the settings menu click on "Apps".
3. On the left side of the window click on "Default apps".
4. Scroll down then click on "Choose default apps by file type".
5. Scroll down to find the file type that you want to change the default program for, then click on the program listed to the right of the file type.
6. Select the program that you wish to use as the default program for that file type.
7. The selected program will then be set as the default program for that file type. Whenever a file of that type is opened it will be now be opened using the selected program.