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Question How do I install the Microsoft ServerXMLHTTP component? I already have the Microsoft XMLHTTP component installed, should I install this instead?

Answer If you have the Microsoft XMLHTTP component installed, you should consider installing the Microsoft ServerXMLHTTP component. The ServerXMLHTTP component is more efficient on very busy web servers and can make the server more reliable when used instead of the older Microsoft XMLHTTP component.

To download and install the Microsoft ServerXMLHTTP component, simply go to the Microsoft web site at the URL below then download and install the MSXML Parser V3.0. As of this writing, this release is V3.0 Service Pack 2. The MSXML Parser V4.0 install does not install all the necessary files on a server that has not previously had V3.0 installed, so be sure to install V3.0 before installing V4.0.

http://msdn.microsoft.com/xml