Office Settings & Configuration

Restore Windows File Associations After Installing Adobe Acrobat

Elise Williams Oct 22, 2026 868 views

Question details

The user needs to revert system file associations to their original state because installing Adobe Acrobat or Adobe Converter reassigned default applications for spreadsheets and documents.

How to Restore Windows File Associations After Installing Adobe Acrobat

Product: Windows
Device & OS: Windows
Scenario: After installing Adobe Acrobat or a PDF converter, default programs for non-PDF files were unexpectedly modified.
Observed behavior: Excel files (.xls, .xlsx) and other documents open in the wrong application, such as Adobe Reader or Microsoft Word, instead of their native software.

Before you start

Make a list of the specific file extensions that are currently opening in the wrong application (e.g., .pdf, .xls, .xlsx) so you can accurately reassign them in the Windows settings.

Solution 1Recommended

Reset Default Apps via Windows Settings

Use the built-in Windows Settings menu to manually reassign file extensions to their correct applications.

This is the most thorough method for ensuring that all your document types are routed to the correct software. You can precisely select which application handles PDFs and which handles spreadsheets.

Open Windows Settings

Click on the Start menu and select the gear icon to open Settings, or simply press the Windows key + I on your keyboard.

Navigate to Default Apps

Click on 'Apps' from the main Settings menu, then select 'Default apps' from the left-hand sidebar.

Choose default apps by file type

Scroll down to the bottom of the Default apps page and click on the 'Choose default apps by file type' link.

Reassign the extensions

Locate the affected extensions (e.g., .xls, .xlsx, .pdf) in the alphabetical list. Click on the current default program next to each extension and select the correct application (e.g., Microsoft Excel for .xlsx, Adobe Reader for .pdf).

Tip: If you don't see the application you want to use in the list, you may need to reinstall or repair that specific application so Windows can detect it.

Solution 2

Change File Association Using the 'Open With' Context Menu

A quick method to change the default program for a specific file type directly from the Windows File Explorer.

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Frequently Asked Questions

Why did installing Adobe Acrobat change my Excel file associations?

During installation, some PDF converter plugins or third-party software attempt to set themselves as the default handler for various document types to facilitate quick conversions, which can inadvertently overwrite your existing spreadsheet or document associations.

How do I reset all my Windows default apps to Microsoft's recommended defaults?

Go to Windows Settings > Apps > Default apps. Scroll to the bottom of the page and click the 'Reset' button under 'Reset to the Microsoft recommended defaults'. Keep in mind this will clear all your custom preferences for web browsers and media players as well.

Will changing the default app affect or damage the contents of my files?

No. Changing a file association only tells Windows which program to use when displaying the file. It does not alter, convert, or damage the internal data of your spreadsheets or PDFs.

What if Microsoft Excel is missing from the 'Open With' list?

If Excel doesn't appear in the list, click 'More apps' and scroll to the bottom to select 'Look for another app on this PC'. Navigate to the Microsoft Office installation folder (usually under C:\Program Files\Microsoft Office) and manually select the EXCEL.EXE executable file.

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