Update 10.1.8.52 not installed Error 406                                     
                                        Auteur : Jean-Pierre B.
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Error while updating: 406 (see attached screen copy)
Windows 8.1
Tryed as Administrator, all programs closed and Bitdefender off.
no success.
Posté le 

Try and download full new version from your profile (top right button profile -> download)
install that one, this should always work.
BR A