How to Fix Cannot Open Embedded PDF in Word After Adobe 64-bit Upgrade
Question details
The user is unable to open a PDF file that is embedded as an object in a Microsoft Word document after upgrading Adobe Acrobat Reader to a 64-bit version.

- Product
- Microsoft Word, Adobe Acrobat Reader
- Device & OS
- Windows
- Scenario
- Attempting to open, view, or interact with a PDF file that has been embedded into an existing Word document.
- Observed behavior
- Double-clicking the embedded PDF fails to launch the file. Changing the default PDF application and attempting to save the PDF locally do not resolve the error.
Ensure that your Windows operating system is fully updated and restart your computer to apply any pending registry changes from the Adobe Acrobat upgrade before proceeding.
Repair or Reinstall Adobe Acrobat Reader
Repairing the Adobe installation can resolve OLE registry errors (such as AcroExch issues) caused during the transition from the 32-bit to the 64-bit version.
Upgrading the software architecture can sometimes orphan legacy Windows Registry keys. As a result, Microsoft Word looks for the old 32-bit application path to open the object, which no longer exists.
Press the Windows key, type 'Control Panel', and press Enter. Navigate to 'Programs' and select 'Programs and Features'.
Locate Adobe Acrobat Reader in the installed programs list, right-click it, and select 'Change' or 'Repair'. Follow the on-screen prompts to complete the repair process, then restart your PC.
If repairing does not work, return to Programs and Features, uninstall Adobe Acrobat entirely, reboot your system, and download a fresh 64-bit installer from the official Adobe website.

Verify PDF Integrity with an Alternative Reader
Determine if the file itself is corrupted or if the issue is strictly related to the Adobe and Word OLE integration.
Contact Adobe Support for Registry Fixes
If standard reinstallation fails, the AcroExch registry keys may require specialized manual correction by a support technician.
Open Embedded PDFs Seamlessly with WPS Office
If Microsoft Word continues to struggle with OLE objects and Adobe registry errors, consider switching to WPS Office. It provides a lightweight, highly compatible alternative with built-in PDF tools, bypassing the need for complex third-party registry integrations entirely.
- 1. Install WPS Office: Download and install WPS Office for free from the official website.
- 2. Open the Document: Open your Word document containing the embedded PDF using WPS Writer.
- 3. View the PDF: Double-click the embedded PDF object to open it instantly via WPS Office's built-in PDF viewer.

Frequently Asked Questions
Why does upgrading to 64-bit Adobe Acrobat break embedded PDFs in Word?
Upgrading to a 64-bit architecture can leave behind outdated 32-bit registry keys (specifically AcroExch OLE settings). Word may still try to access the old 32-bit application path, which no longer exists, causing the launch to fail.
Can I just change the default PDF app in Windows to fix this error?
No. Changing the default PDF app in Windows settings usually only affects standalone PDF files. Embedded objects rely on OLE (Object Linking and Embedding) registry keys, which are not automatically corrected by simply switching the default application.
What does the 'AcroExch' error mean in Microsoft Word?
AcroExch is the programmatic identifier for Adobe Acrobat objects. If an error mentions this term, it means the Windows registry mapping that seamlessly connects Microsoft Word to Adobe Acrobat is corrupted or missing.
How do I recover the data from the embedded PDF if it won't open?
You can often extract the file by saving a copy of the Word document, changing its file extension from .docx to .zip, and extracting the folder. Navigate to the 'word/embeddings' folder inside the unzipped directory to find your raw PDF file.




