The Easiest Way to Fix Microsoft Office 365 Crashes

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Microsoft Office 365, techno-giant’s subscription based Office suite that offers 1 TB of OneDrive storage space in addition to full-fledged installable Office products, gained immense popularity as it offers license to use it on up to five devices. Ever since it was introduced in the market, some users complained the Office applications keep crashing until you find the root causes. This article will help you troubleshoot this issue.

Download Diagnostic

You’re just 3 steps away from fixing this problem…

1. Download and install the Diagnostic

2. Run full scan

3. Perform system clean-up & repair

Estimated download time: 10 Seconds

What is Diagnostic? How does it work?


Update Device Drivers

In most of the cases reported, this issue was caused due to outdated device drivers – software that facilitate communication between your operating system and hardware. Update the device drivers using the Free Wise Driver Care. Restart your computer after successful completion.

Run Office in Safe Mode

You’d probably know about the Safe Mode feature in Windows that prevents loading of faulty drivers, incompatible software. Similarly, the Safe Mode feature in Office disables loading of Add-Ins, a piece of software that adds additional functionality to the original software.

  1. Press Windows Key keys simultaneously.
  2. Use any of the following commands to run respective Office program in the Safe Mode:
    • winword /safe
    • excel /safe
    • powerpnt /safe
    • mspub /safe
    • visio /safe

Disable Faulty Add-Ins

You can also disable individual add-ins through the steps given below:

  1. Open an Office 365 application that crashes repeatedly.
  2. Click the File menu.
  3. Select Options.
  4. Click the Add-Ins tab.
  5. Click the Go button besides Manage: Com Add-In.
  6. Disable all the add-ins that appear in the screen. Dragon Naturally Speaking, KingSoft’s PowerWord and ABBYY FineReader are among the most common add-ins known to have caused Office 365 crashes.
  7. Exit and restart the Office application.

Repair Office Installation

Microsoft Office 365 crashes due to missing or corrupted components. Repairing Office installation should preserve your application settings and reinstall the program.

  1. Press Windows Key X.
  2. Select Programs and Features.
  3. Scroll down and select Microsoft Office 365.
  4. Right-click the program entry; choose Repair.

Delete OSF.DLL File

Some users reported deleting OSF.dll file, located in the Microsoft Office installation directory, fixed the issue.

  1. Double-click This PC icon.
  2. Open the following directory:
    • C:\Program Files\
  3. Backup the following files to Desktop or any other location and then delete the original files:
    • ..\Microsoft Office 15\Root\Office15\OSF.DLL
    • ..\Microsoft Office\Office15\OSF.DLL

Check for Updates Online

The best way to update Office and Windows is to let itself do it for you. Whenever you’re prompted to update, confirm the action. However, if for some reason, you missed important updates, you might want to manually initiate the update process as shown under:

Updating Office

  1. Click the File menu.
  2. Select Account.
  3. Click Update Options drop-down icon, and then select Update Now.

Updating Windows

  1. Click the Start button, select Settings.
  2. Click on Update & Security, and then Windows Update.

Re-create Mail Profile

If you’re encountering issues with Microsoft Office Outlook app, the mail profile could be corrupt. You might want to delete it and re-create a new profile using the Mail icon in the Control Panel.

  1. Press Windows Key X.
  2. Select Control Panel.
  3. Click the Mail icon.
  4. Click on Show Profiles.
  5. Choose a corrupted mail profile, and then click Remove.
  6. Click on Add.
  7. Type a name for your new profile, and then provide user name, SMTP address and password.
  8. Click Next.
  9. If you’re asked to confirm allowing websites to configure your domain server settings, click Don’t ask me about this website again.
  10. Click Allow.
  11. You’ll be prompted to enter your log-in credentials again.
  12. Finally, click OK.

Disable Graphic Acceleration

The Graphics Acceleration, also called as Video Acceleration, feature faster the image refreshing speed of a monitor. At times, this issue leads to conflicts with the functioning of your software and Office 365 crashes unexpectedly. You might want to temporarily turn off this feature.

  1. Click the File menu, select Options from the menu.
  2. Click the Advanced tab.
  3. Uncheck Disable hardware graphics acceleration.
  4. Click OK.
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