This is CRM on-premise, which isn't an option below when selecting a version.
When installing v9.0.18 we recived the following message. However the update was successful. Is this something I need to worry about?
12:42:17| Info| Error in installing Brotli compression module, Error: The process cannot access the file 'C:\Windows\system32\inetsrv\iisbrotli.dll' because it is being used by another process.