I face issue when trying to update the OCS version on server, every time I get timeout error.
Have you tried increase execution time and verify if it solves your issue?
You can find how to do that searching in sites like StackOVerFlow by terms, e.g:“increase maximum execution time in php”.
If I am not wrong, IIS also deals with PHP.INI file, so you can try extend max_execution_time parameter in this file.
Public Knowledge Project Team