Note. Support for XML Core Services 4.0 has ended. Support was only available for Service Pack 3. Microsoft Learn
Older applications (like Toad for Oracle, SQL Server tools, or older games) install it as a necessary dependency. Microsoft Msxml 4.20.9818.0
This software is considered and a significant security risk. SQL Server tools
You likely didn't install this manually. It usually arrives in one of two ways: Microsoft Msxml 4.20.9818.0