How do I ensure that both I and my customers have the latest Microsoft roots in my certificate store?

(My Original Blog Post: How do I ensure that both I and my customers have the latest Microsoft roots in my certificate store?)
For Windows XP, everything is automatic. For older versions of the Windows operating system, it is highly recommended that the latest root update is installed. Good security policy dictates that your root certificate store should have the most current root certificate references from all trusted certification authorities, thereby providing the widest capability to recognize trusted content. Install the latest Microsoft root certificate patch here.

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