Event ID 1015 is logged in the Application log when you use the OHotFix program to install Office updates [KB-Links: Microsoft KB907341]
When you use the OHotFix program to install Microsoft Office updates, the following event may be logged in the Application log by the installer:
Event ID: 1015
Failed to connect to server. Error: 0x800401F0
Note The error code 0x800401F0 translates to the following error description:
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article 907341.