yup, newbie tonight! LOL...at least I found a fix-it for the problem. Was afraid to download a different PDF viewer...though don't care much for Adobe as their support is non existent for photo editing software I have.
Yes and deleted it along with other files PUPs.... then Adobe could not open. Did an uninstall & reinstall and there was that Nasty file again (according to MalwareBytes, so added an exception: C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader Program now works.