Hello Charles, 'tis a nice day today. 

 CJ> Sounds like you are in better shape than I am.

        Debatable !

 CJ> McAfee puts its icons in the taskbar but it doesn't appear in
 CJ> Control Panel.  Any attempt to uninstall results in the mentioned
 CJ> error message.

        That is not where to look. It will be where you elect to let it
 install. Normally C:\Program Files\McAfee. Then to uninstall, you have
 to go through Add\Remove Programs in the Control Panel. After it says
 that it has been removed, I go to Regedit and after an Alt-E(dit) ->
 Find: McAfee and also Scan Disk, I delete them all to really and
 thouroughly get rid of all traces of McAfee.

        Works for me.

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