Adobe reader would not update to latest version. Half way thru update produced error codes; other update attempts the update failed and said administrator privaleges were needed to complete the update.
Searching the web found a solution that worked perfectly:
From the Guide to PC support at About.com:
The problem is the Adobe download manager has problems. Download latest Adobe reader from filehippo:
http://www.filehippo.com/download_adobe_reader/Click the "Download Latest Version" on the top right. This is the redistributable version - meaning the whole thing, in its entire format.
Several readers had responded to this answer, saying it worked perfectly. So I tried it and YES it works as described.