Ok here is the info I got using KDE Package Manager and the same errors when I do sudo dpkg -i Avast.deb and the same when I login as root.
<raveler 2.0 (partition 1)/Freespire/avast4Linux.deb' ;echo RESULT=$?
Selecting previously deselected package avast4workstation.
(Reading database ... 86520 files and directories currently installed.)
Unpacking avast4workstation (from .../Freespire/avast4Linux.deb) ...
dpkg: dependency problems prevent configuration of avast4workstation:
avast4workstation depends on libc6 (>= 2.3.2.ds1-21); however:
Version of libc6 on system is 2.3.2.ds1-19.0.0.50.0.0.0.0.m1.
dpkg: error processing avast4workstation (--install):
dependency problems - leaving unconfigured
Errors were encountered while processing:
avast4workstation
RESULT=1
Later
Chambers