In order to fix the error message The program can’t start because ApiClient.dll is missing from your computer, when opening Office, follow the below suggestions: In ...

This is an undesirable program. This file has been identified as a program that is undesirable to have running on your computer. This consists of programs that are misleading, harmful, or undesirable.

This is a valid program, but it is up to you whether or not you want it to run on startup. Whether or not you need to run this program on startup must be decided by you. If you feel that you want ...