Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Seokjoo,
We'd like to confirm some information before the troubleshooting.
- Where did you download the Office 365?
- You can try changing to another network environment to see whether the problem still persists.
- Try using easy fix tool to uninstall Office then reinstall, by the way, do you have any anti-virus software on your PC? For more information, you can refer to this article: Error code 0-1011, 30088-1015, 30183-1011, or 0-1005 when installing Office.
Regards,
Tisky