You likely didn't install this manually. It usually arrives in one of two ways:
Note. Support for XML Core Services 4.0 has ended. Support was only available for Service Pack 3. Microsoft Learn Microsoft Msxml 4.20.9818.0
Microsoft MSXML 4.20.9818.0 is a specific version of . It is an older system component used by legacy Windows applications to parse and process XML data. Critical Status: Obsolete and Insecure You likely didn't install this manually
Older applications (like Toad for Oracle, SQL Server tools, or older games) install it as a necessary dependency. SQL Server tools