Office Performance Issues

How to Fix Microsoft Word 365 Running Extremely Slow

Nimra Malik Sep 28, 2026 868 views

Question details

The user is experiencing severe performance issues in Microsoft Word 365, including drastically slow startup times and heavy input lag during use.

How to Fix Microsoft Word 365 Running Extremely Slow

Product: Microsoft Word 365
Device & OS: not provided
Scenario: Opening Word documents, scrolling through pages, clicking menus, and typing text.
Observed behavior: Microsoft Word 365 takes approximately 30 seconds to open. Once open, it becomes unusably slow across all documents, with delayed text rendering and failure to record typing.

Before you start

Before applying these fixes, save your work and close any other heavy applications running in the background to ensure the slowness is not caused by high CPU or memory usage on your system.

Solution 1Recommended

Roll Back the Office Version and Pause Updates

Reverting to an earlier, stable build of Office 365 can resolve sudden performance degradation caused by recent bugged updates.

Microsoft occasionally releases updates that may contain bugs affecting performance on certain hardware configurations. Rolling back allows you to use a previously stable version while Microsoft works on a patch.

Open Command Prompt

Click the Start menu, type 'cmd', right-click on 'Command Prompt', and select 'Run as administrator'.

Navigate to the ClickToRun folder

Type the command `cd %programfiles%\Common Files\Microsoft Shared\ClickToRun` and press Enter.

Execute the rollback command

Type `officec2rclient.exe /update user updatetoversion=16.0.xxxxx.xxxxx` (replace the x's with your target stable build number) and press Enter to begin the downgrade process.

Disable automatic updates

Once completed, open Word, go to 'File' > 'Account', click 'Update Options', and select 'Disable Updates' so the buggy version does not automatically reinstall.

Roll Back the Office Version and Pause Updates

Finding Build Numbers: You can find a list of previous stable Microsoft 365 build numbers on the official Microsoft Learn update history page.

Solution 2

Uninstall and Reinstall Microsoft 365

Performing a clean installation removes corrupted application files or residual configurations that might be causing the extreme lag.

Solution 3

Contact Microsoft Support for Remote Assistance

If standard troubleshooting fails, official support can provide specialized remote diagnostics to identify deeper system conflicts.

Free Microsoft Office alternative

Experience Smooth Document Editing with WPS Office

If Microsoft Word 365 continues to lag, freeze, or take too long to open, switch to WPS Office. It is a highly optimized, lightweight alternative that opens massive documents in seconds and provides a lag-free typing experience.

1. Download and Install: Visit the WPS Office website, download the free installer, and complete the quick installation process.
2. Open Your Documents: Launch WPS Writer and open your existing .docx files directly without any conversion or formatting loss.
3. Edit Without Lag: Enjoy a responsive, fast, and smooth editing experience even with large, media-heavy documents.

Fully compatible with Microsoft Word (.docx), Excel, and PowerPoint formats.Extremely lightweight architecture that runs smoothly even on older or lower-spec computers without lagging.Familiar ribbon interface requiring zero learning curve for Microsoft Office users.Free to use for everyday document creation, editing, and formatting tasks.

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Frequently Asked Questions

Why is Word 365 suddenly typing very slowly?

Sudden input lag in Word 365 is commonly caused by bugged recent updates, corrupted third-party add-ins, or hardware graphics acceleration conflicts.

How do I open Microsoft Word 365 in Safe Mode to test performance?

Press and hold the CTRL key while clicking your Word shortcut, or press Windows + R, type 'winword /safe', and press Enter. This launches Word without add-ins, helping you identify if an extension is causing the slowness.

Will I lose my Word documents if I completely uninstall Microsoft 365?

No. Uninstalling Microsoft 365 using the official tool only removes the application files. Your personal documents, whether saved locally on your drive or synced to OneDrive, remain completely safe and untouched.

Does disabling hardware graphics acceleration help Word run faster?

Yes, if your graphics drivers are outdated or conflicting with Office, disabling hardware acceleration in Word's Advanced Options can stop screen tearing and typing lag.

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