in updating these two, I get the following:
skype: error message 1638. manual update from skype program shows latest version running;
7zip: no error message, finishes with "0", shows need to update immediately thereafter.
Are you still seeing the 7-Zip error? for Skype error 1638 = Another version of this product is already installed. Installation of this version cannot continue. To configure or remove the existing version of this product, use Add/Remove Programs on the Control Panel.
(You may need to uninstall Skype then rerun the update)