How to Fix Outlook Freezing Caused by Adobe Acrobat
Question details
Users experience Microsoft Outlook freezing or hanging, which only resolves when Adobe Acrobat is forcibly closed.
- Product
- Microsoft Outlook, Adobe Acrobat
- Device & OS
- Windows
- Scenario
- Using Microsoft Outlook alongside Adobe Acrobat, frequently occurring after a recent Acrobat software update.
- Observed behavior
- Outlook freezes and becomes completely unresponsive. Standard troubleshooting attempts such as reinstalling the applications, rebuilding the OST file, and altering security settings do not resolve the issue.
Before proceeding, ensure you have saved any draft emails and completely closed out of both Microsoft Outlook and Adobe Acrobat.
Install Latest Updates and Repair Microsoft Office
Outdated software versions can cause critical conflicts between Acrobat and Outlook. Keeping both updated and repairing the Office installation is the most effective first step.
Compatibility issues often arise when one application is updated while the other is not. Ensuring both your operating system and office applications are on the latest versions can natively patch these integration bugs.
Check for system updates in your Windows Settings. Open Adobe Acrobat, click on the 'Help' menu, and select 'Check for Updates' to ensure you have the latest patches installed.
Open any Microsoft Office application like Word or Excel. Navigate to File > Account > Update Options, and click 'Update Now'.
Open the Windows Control Panel and navigate to Programs > Programs and Features. Select Microsoft Office from the list, click 'Change', choose 'Online Repair', and follow the on-screen prompts.
Once all updates and repairs are complete, restart your computer and launch Microsoft Outlook to test if the freezing issue persists.
Run Outlook in Safe Mode and Disable the Acrobat Add-in
Running Outlook in Safe Mode helps determine if the Adobe Acrobat integration plug-in is the direct cause of the freezing.
Roll Back Acrobat and Inspect Background Processes
If the issue started immediately after a recent Acrobat update, reverting to a previously supported build can temporarily stabilize Outlook.
Experience a Crash-Free Workflow with WPS Office
If Microsoft Office continues to freeze or conflict with third-party PDF readers, consider switching to WPS Office. It provides a lightweight, highly compatible alternative with built-in PDF tools, reducing the need for heavy third-party plugins that cause application hangs.
Frequently Asked Questions
Why does Outlook freeze when I interact with PDF attachments?
This usually occurs due to a conflict or an outdated integration between your PDF software (like Adobe Acrobat) and the Outlook email client. If the PDF previewer or background MAPI process malfunctions, it forces the entire email client to hang.
Will disabling the Adobe Acrobat add-in in Outlook delete my PDFs?
No, disabling the COM add-in only stops Outlook from using Acrobat's specialized tools inside the email client interface. Your local PDF files and the standalone Adobe Acrobat application will remain completely unaffected.
What is 64BitMAPIBroker.exe and why is it crashing Outlook?
The 64BitMAPIBroker.exe is a background process used by Adobe Acrobat to communicate with 64-bit email clients like Microsoft Outlook. If this process hangs due to a software bug following an update, it will cause Outlook to stop responding until the process is manually ended in Task Manager.
How do I access Event Viewer logs to send to Adobe Support?
Press the Windows Key, type 'Event Viewer', and open the application. Expand 'Windows Logs' on the left pane and click 'Application'. Look for red 'Error' entries related to Acrobat or Outlook, right-click them, and select 'Save selected events' to export the file for support.
