Update 10.1.8.52 not installed Error 406 
Autor: 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.
Posted on the
Try and download full new version from your profile (top right button profile -> download)
install that one, this should always work.
BR A