Fix Outlook, Word, and Excel Freezing When Inserting a PDF
Question details
User experiences complete application freezing when attempting to insert a PDF file into Microsoft Outlook, Word, or Excel.

- Product
- Microsoft Office 2016
- Device & OS
- Windows 10
- Scenario
- Inserting a PDF document into an Outlook email, Word document, or Excel workbook using Acrobat 2017.
- Observed behavior
- The Microsoft Office application becomes completely unresponsive and freezes indefinitely upon inserting the PDF file.
Verify that the PDF file you are trying to insert is not corrupted, excessively large, or heavily encrypted, as these factors can cause the Object Linking and Embedding (OLE) process to hang.
Repair Your Microsoft Office Installation
Running the built-in repair tool can fix corrupted Office program files that handle OLE (Object Linking and Embedding) operations, which are responsible for inserting PDFs.
Microsoft Office relies on background registry keys and integrated components to insert external objects like PDFs. If these components are damaged, the host application will freeze.
Click the Windows Start menu, type 'Control Panel', and press Enter.
Click on 'Programs' and then select 'Programs and Features' to view your installed applications.
Scroll down to find 'Microsoft Office 2016' (or your respective version), right-click it, and select 'Change'.
Select 'Quick Repair' and click 'Repair'. If the issue persists after completion, repeat the process and choose 'Online Repair' for a more thorough fix.

Update Adobe Acrobat and Fix Default App Settings
Outdated PDF handlers or incorrect default app assignments in Windows 10 can cause communication breakdowns between Office and Adobe Acrobat.
Insert PDF as a Standard File Attachment
Bypass the OLE object insertion feature entirely by attaching the PDF as a standard file, which avoids triggering the freeze.
Experience a Crash-Free Document Workflow with WPS Office
If Microsoft Office continues to freeze when handling PDFs, consider switching to WPS Office. It features a native, built-in PDF reader and editor that flawlessly integrates with documents, spreadsheets, and presentations without relying on third-party software like Adobe Acrobat.
- 1. Download and Install: Visit the official WPS Office website to download and install the free, lightweight software suite.
- 2. Open Your Documents: Launch WPS Office to effortlessly open all your existing Word, Excel, and PDF files in one unified workspace.
- 3. Manage PDFs Natively: Use the integrated PDF tools to insert, edit, or convert PDF content directly within your documents without experiencing application freezes.

Frequently Asked Questions
Why does inserting a PDF cause Microsoft Office to freeze?
This happens due to a failure in Object Linking and Embedding (OLE). When you insert a PDF as an object, Office relies on the default PDF handler (like Adobe Acrobat) to render it. If there is a compatibility issue, missing registry key, or outdated add-in, the process hangs and freezes the Office app.
Does this issue only affect Office 2016 and Acrobat 2017?
No. While frequently reported with Office 2016 and older versions of Acrobat, this OLE conflict can happen in newer versions of Microsoft 365 or Office 2019/2021 if the third-party PDF software is outdated or corrupted.
Can I insert a PDF into an Excel sheet without it freezing?
Yes. Instead of inserting the PDF as a live OLE object, use the 'Create from File' option under the Insert Object menu and check 'Display as icon'. Alternatively, you can convert your PDF data to Excel format using a PDF editor first.
How do I fix Outlook freezing when attaching a PDF?
Ensure you are using the 'Attach File' button (paperclip icon) rather than the 'Insert Object' option. If standard attachments still cause freezing, disable the PDF preview handler in Outlook's Trust Center settings.




