About the updating process

Reader application files and components can be updated in a variety of ways. Some updates are available when you open a PDF that triggers the updating process automatically. For example, if you open a form that uses Asian-language fonts, Reader asks whether you want to download the fonts. Other updates are available only from the Help menu, and you must install them manually. Some updates are available both automatically and manually.

Depending on your preferences settings, Reader downloads updates in the background.