Expand the 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services' key and delete the 'ose' subkey, if it is present. Expand the 'Installer\UserData\S-1-5-18\Products' key and then delete the '_F01FEC' key. Expand the 'Installer\Upgrade Codes' key and then delete the '_F01FEC' key. Expand the 'Uninstall' key and then delete the ' 0FF1CE' subkey. Expand the 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion' key. Expand the 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Delivery\SourceEngine\Downloads' key and then delete the ' 0FF1CE}-' subkey. Remove registry keys created by the MSI installation of Office 2013 by deleting the 'HKEY_CURRENT_USER\Software\Microsoft\Office\15.0' and 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\15.0' subkeys.