Office アプリの設定、プロダクト キーの引き換え、ライセンス認証を行うことに関する Microsoft 365 のプロセス。
Hi PC, Welcome in Community
The installer frequently halts because it detects conflicting processes from a previous attempt. Open the Task Manager by pressing Ctrl + Shift + Esc and look through the processes list for any entries titled Office Integrated Setup, Microsoft Office Click-to-Run, or Setup.exe. Right-click every instance you find and select End Task to ensure the environment is completely clear for a fresh start.
Now you need to remove conflictual entry in system registry, open the Run dialog by pressing Windows Key + R, type regedit, and navigate to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office
Locate the folders labeled 16.0 or ClickToRun and delete them; this action wipes the corrupted installation "memory" that is blocking your new setup.
Final step is download the appropriate installer from your Microsoft Account Services page, locate your Office 2016 purchase, and click Install. Within the configuration options, select Other Options and choose Download an offline installer to get a complete disk image that can be installed without relying on a live, potentially unstable connection.
Let me know how it goes
Elvis