Try above cmds as root.
If you are still unable to install BitDefender, there is also Clam AV available for Linux. This has a KDE GUI front-end also, IIRC.
[FONT=Fixedsys]Webpin](http://packages.opensuse-community.org/index.jsp?distro=openSUSE_112&searchTerm=clamav)[/FONT]-CLamAV](http://packages.opensuse-community.org/index.jsp?distro=openSUSE_112&searchTerm=clamav)
You do know that you don’t really need this application in Linux?!
Anti-virus applications can be useful for Linux users who also have Windows installed - to check Windows files/folders for viruses.