Veeam Endpoint Backup 1.1.x may have an issue with Windows 10 machine updated with the latest big update. Windows 10 support has been introduced in version 1.1 and it works well, but after the Threshold 2 (or Fall Upgrade) some Veeam Endpoint Backup database files could be moved during the OS upgrade procedure. It’s not sure yet if all version are impacted or only Windows 10 coming from a previous major upgrade (Windows.old is normally used to keep a rollback for an in-place upgrade).