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getting error while updating the mcafee patch in 800xa 6.0.3 system

Hi,
i am updating mcafee anti virus DAT file, i am getting an error "
8/6/2019 2:57 PM 800xAInstall ES2 Error: Unable to backup existing file. Not enough rights. : Line: 12 " the dat file was updated today in abb download center. kindly suguest any solution for this. also i am updating the the mcafee version and error details