What is generating these errors in W8 on a SATA drive is becoming apparent. What can eliminate them is not... SChannel errors are seen after each Windows Update (and perhaps in other instances). Distributed COM permission errors pop up after clicking on certain start menu tiles (and that may not be the only cause). Though several posts in forums suggest how to change permissions via Component Services and the registry, none of those measures is available here. Greyed out or "access denied." Drivers are as up-to-date as can be found. W7 runs precisely the same software/hardware on this box - but on an SSD drive - without the errors. Despite the DCom error, the clicked start menu items (weather and finance) do eventually appear.