A. The message you describe reads

A provider, <name>, has been registered in the WMI namespace,                              <namespace>, to use the LocalSystem account. This account is privileged                              and the provider may cause a security violation if it does not correctly                              impersonate user requests.

An example <name> would be OffProv (for Microsoft Office) and an example <namespace> would be Root\MSAPPS. Although this warning sounds serious, it's an informational message letting you know that WMI has received a registration for a new provider that will run with elevated privileges (SYSTEM). If you're satisfied that this component can run safely with these privileges, you can ignore this message. Otherwise, you might want to uninstall the provider component or contact the provider's manufacturer.