One of the things I have been trying to improve is the users “first logon” experience in Windows 10. Waiting for the OneDrive sync client to “do its thing” reminded me of that one kid in the class that could be awesome if they tried harder. After the user profile is created (another post coming soon on tweaking the speed of this), OneDriveSetup.exe was called from the Default User Hive “Run” key. If OneDrive wasn’t installed in the User’s Profile (unlikely for a new profile), it would go and throw the binaries in %localappdata%, check for updates, twiddle its thumbs and eventually download some files or stubs.