On Windows, the first checks are whether OneDrive is just hidden or not actually running:
- Look at the far right of the taskbar notification area for the white or blue OneDrive cloud icon.
- Click Show hidden icons to see whether the icon is there.
- If the icon is not there, select Start, type OneDrive, and open OneDrive from the search results.
If OneDrive still does not start, update Windows and then install the latest OneDrive version again:
- Install the latest Windows updates.
- Download the latest version of OneDrive and install it.
- Open Start, search for OneDrive, and open the OneDrive desktop app.
- When OneDrive Setup starts, enter the Microsoft account email address and select Sign in.
If the app appears to be installed but still will not run, reinstalling OneDrive can help. This resets OneDrive settings and triggers a full sync, but files stored in OneDrive are not lost.
- Select Start, type Programs, and open Add or remove programs.
- Under Apps & features, find Microsoft OneDrive.
- Select Uninstall.
- Download the Microsoft OneDrive app from the website again.
- Open the downloaded file and follow the prompts to sign in and get started.
Important details:
- Microsoft OneDrive is the backup and sync app.
- OneDrive by Microsoft Corporation from the Microsoft Store is mainly for viewing OneDrive and does not back up and sync files.
- Reinstalling may require choosing sync folders again after setup completes.
If this is a work or school PC, OneDrive can also be blocked by an organization policy. In that case, the registry key below indicates the block:
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\OneDrive
If DisableFileSyncNGSC = DWORD:1, OneDrive for work or school is being prevented from starting. Editing the registry is risky and policy-based changes should be handled by the organization administrator, because manual changes can be overwritten after restart or sign-in.