Office Performance Issues

How to Fix Word 365 High CPU and Power Usage During OneDrive Sync

Huda Qurayshi Oct 10, 2026 868 views

Question details

Users experience severe system slowdowns, high CPU usage, and rapid battery drain when editing Word 365 documents located in synchronized OneDrive folders.

How to Fix Word 365 High CPU and Power Usage During OneDrive Sync

Product: Microsoft Word 365
Device & OS: Windows
Scenario: Editing a Microsoft Word document that is stored in an active OneDrive folder, particularly when the AutoSave feature is turned on.
Observed behavior: Word and OneDrive consume excessive CPU resources and power, causing system fans to spin up and reducing overall computer performance.

Before you start

Before making changes, verify that Word and OneDrive are the actual causes of the battery drain by checking the Processes tab in your Windows Task Manager. Additionally, ensure both your Windows operating system and Microsoft 365 apps are updated to their latest versions, as Microsoft frequently patches performance defects.

Solution 1Recommended

Pause OneDrive Synchronization While Editing

Temporarily halting OneDrive sync prevents the constant background uploading that triggers high CPU usage when AutoSave is active.

Testing confirms that Word consumes normal CPU resources when OneDrive synchronization is paused. The excessive resource usage typically stems from a conflict or continuous loop between Word's AutoSave feature and the OneDrive desktop client trying to sync the same file simultaneously.

Locate the OneDrive icon

Look for the blue or white cloud icon in your Windows system tray, located at the bottom right corner of your taskbar.

Open OneDrive settings

Click the OneDrive icon to open the activity center, then click the Gear (Help & Settings) icon.

Pause syncing

Select 'Pause syncing' from the dropdown menu and choose a timeframe (e.g., 2 hours or 8 hours) that covers your expected editing session.

Resume syncing

Once you are finished editing and have closed Word, return to the OneDrive menu and click 'Resume syncing' to back up your changes.

Pause OneDrive Synchronization While Editing

AutoSave Behavior: While OneDrive is paused, your document changes are still saved locally. Once you resume syncing, OneDrive will effortlessly upload the latest version.

Solution 2

Work on a Local Document Copy

Editing a file entirely outside the OneDrive folder physically isolates Word from the synchronization process.

Solution 3

Sign Out of Microsoft Word

Logging out stops Word from natively communicating with Microsoft's cloud services, forcing it to act like an offline editor.

Free Microsoft Office alternative

Switch to WPS Office for Fast, Lightweight Document Editing

If Microsoft Word 365 continues to drain your battery and hog your CPU, consider switching to WPS Office. It provides a lightweight, highly compatible, and free alternative that handles local and cloud documents smoothly without dragging down your system performance.

1. Download the software: Visit the official WPS Office website to download the free installation package for your Windows device.
2. Install and launch: Run the installer, complete the quick setup, and launch the WPS Writer application.
3. Open your DOCX files: Drag and drop your existing Word documents directly into WPS Office to edit them seamlessly with low CPU consumption.

Consumes minimal CPU and RAM, ensuring smooth performance on older laptops and battery-powered devices.Fully compatible with Microsoft Office document formats including DOCX, XLSX, and PPTX.Familiar user interface requires zero learning curve, allowing you to start working immediately.Offers efficient cloud capabilities that won't overwhelm your system resources.

microsoft office alternative - wps office

Frequently Asked Questions

Why does AutoSave make the CPU usage worse in Word 365?

AutoSave constantly pushes micro-updates to Microsoft's cloud servers. When both Word and the OneDrive desktop client are simultaneously trying to read, write, and sync the same file, it creates a processing loop that aggressively consumes CPU cycles and drains power.

Will simply turning off AutoSave fix the high CPU problem?

Turning off AutoSave does not always reduce the CPU usage if the document is still actively being monitored by the OneDrive sync client. Testing has shown that pausing the OneDrive application entirely is a much more reliable workaround.

Is there a permanent fix for this Word 365 and OneDrive sync issue?

Currently, this is a known behavioral defect affecting various Microsoft 365 builds since 2019. The most effective permanent strategy is to keep your Windows OS and Office suite updated to the latest builds, as Microsoft regularly releases performance optimization patches.

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