This topic describes requirements and other information related to installing MSXML 6.0. Overview MSXML 6.0 provides improved reliability, security, and performance. It is recommended that you upgrade earlier versions of MSXML to MSXML 6.0. Installing MSXML 6.0 will not affect existing applications that use MSXML 3.0 and MSXML 4.0. Version-independent ProgIDs will not point to MSXML 6.0. Developer