title: How can I find the product GUID of an installed MSI setup?
body: <p>I need to find the <strong>product GUID</strong> for an <strong>installed MSI file</strong> in order to perform maintenance such as <strong><code>patching</code></strong>, <strong><code>uninstall</code></strong> (<a href="https://stackoverflow.com/questions/450027/uninstalling-an-msi-file-from-the-command-line-without-using-msiexec/1055933#1055933"><strong>how-to uninstall</strong></a>) and also for <strong><code>auditing purposes</code></strong>.</p>