Unless you are opening a legacy project from a decade ago, there is very little reason to seek out Arial Body CS. Modern alternatives like Arial Nova or Arimo offer superior rendering for body text without the legacy baggage.

: Verify if "Arial" is installed in your system's font folder (e.g., C:\Windows\Fonts Reset Document Themes : In Word, go to the and ensure a theme using Arial is selected. Official Source

If your document is switching between "Arial" and "Arial (Body)" seemingly at random, you are likely dealing with . If you change your document's "Design Theme," every instance of "Arial (Body)" will change to the new theme font automatically, while plain "Arial" will stay the same. To keep things consistent, stick to one or the other! Summary Checklist