You can change the startup type of the "Office Source Engine" to "Disabled" if you do not plan on modifying your Office installation, though this is not recommended if you still use that version of Office. Conclusion

The term refers to the core installation directory for the volume-licensed retail edition of Microsoft Office Professional Plus (spanning versions 2007, 2010, 2013, and 2016). Within that directory, Ose.exe stands for the Office Source Engine . This is an essential background service used by Windows to accept, cache, extract, and monitor system updates or localized installation files.