A small problem with the 64-bit version of the Silverlight browser plugin. When it is already installed, Patch My PC detects it and updates it properly. But when it is not installed, Patch My PC offers on the left column just one version and that's the x86 version. If installed, it will not show up in a 64-bit browser like Pale Moon x64. My suggestion: offer both versions (available here (http://www.filehorse.com/download-silverlight/) for example) similar to Java. I'm not sure if the default Microsoft download includes the 64-bit browser plugin version.