OneDrive Error Codes

Fix the OneDrive Must Be Running Error in Windows

Algirdas Jasaitis Sep 30, 2026 869 views

Question details

The user is unable to sync or access cloud files because the OneDrive application claims it is not running or is disconnected.

How to Fix the OneDrive "Must Be Running" Error

Product: Microsoft OneDrive
Device & OS: Windows
Scenario: Attempting to access, sync, or modify files utilizing the OneDrive desktop application.
Observed behavior: An error message appears stating: "Make sure OneDrive - Personal is running on your PC, then try again."

Before you start

Ensure your computer has a stable internet connection and verify the Microsoft 365 service status page to rule out any widespread server outages before troubleshooting local app issues.

Solution 1Recommended

Restart the OneDrive Client and Enable Auto-Start

Manually restarting the OneDrive process and configuring it to launch on startup often resolves connection drops.

Often, the OneDrive client silently crashes in the background or fails to boot correctly with Windows. Restarting it manually and ensuring auto-start is active is the most effective solution.

Close OneDrive from the system tray

Locate the OneDrive cloud icon in the system tray on your taskbar. Right-click the icon, select "Help & Settings", and click "Close OneDrive".

Restart the application

Press the Windows key, type "OneDrive" in the search bar, and click the OneDrive app to launch it manually.

Enable auto-start in settings

Right-click the OneDrive icon in the system tray again, open "Settings", and check the box that says "Start OneDrive automatically when I sign in to Windows."

Restart the OneDrive Client and Enable Auto-Start

Sync Restored: Once the application restarts, it may take a few moments to look for changes and resume syncing your files.

Solution 2

Restart Your PC and Check the Network

A temporary system conflict or network glitch might prevent OneDrive from connecting properly.

Solution 3

Reinstall the OneDrive App

If the application files are corrupted and it refuses to stay open, a clean installation is required.

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Frequently Asked Questions

Why does OneDrive say it must be running when it is already open?

This usually happens if the OneDrive background process has frozen or if there is a conflict between multiple sync instances. Closing it completely via the Task Manager and reopening it typically resolves this.

Will reinstalling OneDrive delete my locally saved files?

No, uninstalling and reinstalling the OneDrive client only affects the application software. Your local files and the files stored in the cloud remain untouched and perfectly safe.

How do I check if Microsoft 365 services are down?

You can check the official Microsoft Service Health Status page via your web browser. If there is an ongoing server outage, OneDrive will not connect, and you will need to wait until Microsoft resolves the issue.

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