Office Apps Freezing

Fix Outlook, Word, and Excel Freezing When Inserting a PDF

Rana GarciaRana Garcia Oct 28, 2026 870 views

Question details

User experiences complete application freezing when attempting to insert a PDF file into Microsoft Outlook, Word, or Excel.

How to Fix Outlook, Word, and Excel Freezing When Inserting a PDF
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.
Before you start

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.

Solution 1Recommended

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.

1
Open the Control Panel

Click the Windows Start menu, type 'Control Panel', and press Enter.

2
Navigate to Programs and Features

Click on 'Programs' and then select 'Programs and Features' to view your installed applications.

3
Initiate Office Repair

Scroll down to find 'Microsoft Office 2016' (or your respective version), right-click it, and select 'Change'.

4
Run Quick or Online Repair

Select 'Quick Repair' and click 'Repair'. If the issue persists after completion, repeat the process and choose 'Online Repair' for a more thorough fix.

Repair Your Microsoft Office Installation
Close All Office Applications: Ensure Outlook, Word, and Excel are completely closed before starting the repair process to prevent errors.
Free Microsoft Office alternative

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. 1. Download and Install: Visit the official WPS Office website to download and install the free, lightweight software suite.
  2. 2. Open Your Documents: Launch WPS Office to effortlessly open all your existing Word, Excel, and PDF files in one unified workspace.
  3. 3. Manage PDFs Natively: Use the integrated PDF tools to insert, edit, or convert PDF content directly within your documents without experiencing application freezes.
Native PDF integration prevents OLE freezing and crashesFully compatible with Microsoft Word, Excel, and PowerPoint formatsLightweight application requiring fewer system resourcesFree to use with a familiar, easy-to-navigate tabbed interface
microsoft office alternative - wps office

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.