Microsoft Msxml 4.20.9818.0 Link

You likely didn't install this manually. It usually arrives in one of two ways:

Microsoft officially ended support for MSXML 4.0 in April 2014 .

4.20.9818.0 is an older sub-version of SP2. Even the "newer" SP3 (version 4.30.2100.0) is also now unsupported. 🛠️ Why is it on your computer? Microsoft Msxml 4.20.9818.0

This software is considered and a significant security risk.

Note. Support for XML Core Services 4.0 has ended. Support was only available for Service Pack 3. Microsoft Learn 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.

It was commonly included in or updated via Windows XP, Vista, and Windows 7. ✅ Should you keep or remove it? Microsoft XML Core Services 4.0 - Microsoft Lifecycle Even the "newer" SP3 (version 4

Because it no longer receives updates, it is frequently flagged by security scanners (like Nessus or Qualys) as a vulnerability.