One Drive not reponding

The message that OneDrive is being blocked “for safety” usually indicates that either:

1. A specific file in OneDrive has been flagged as malicious and is blocked, or
2. Security or connectivity protections are preventing OneDrive from running or signing in.

To narrow it down, check the following:

1. Open OneDrive on the web
   • Go to the OneDrive website and sign in.
   • If OneDrive opens in the browser but not on the desktop, the issue is with the local app or device, not the account.
2. Check if a specific file is blocked as malicious
   • In OneDrive on the web, locate any file that shows as blocked or has a warning banner.
   • Files that are deemed malicious in OneDrive, SharePoint, or Microsoft Teams are blocked so they cannot be opened.
   • Do not try to bypass the block; it is there to protect against malware such as ransomware or unwanted software.
3. Keep Windows and security software up to date
   • Install the latest Windows updates on the device.
   • Ensure security software (for example, Windows Security/Defender) is up to date and run a full scan.
4. If OneDrive app itself will not start
   • Make sure Windows and OneDrive are fully updated.
   • If needed, uninstall and reinstall the OneDrive app. Files in the cloud are not deleted by uninstalling the client; they remain accessible via OneDrive.com.

If the warning is about a specific file, leave it blocked and delete it if not needed. If the entire app is being blocked and updates plus reinstall do not help, access files via the web while working with local security/IT policies to identify what is blocking the client.

References:

• What to do when a malicious file is found in SharePoint Online, OneDrive, or Microsoft Teams
• "OneDrive cannot connect to Windows" error when accessing files in OneDrive
• Fix problems uploading files on the OneDrive website
• What do the OneDrive error codes mean?