If you want a GUI for clamav, you need to install a separate package for that (it's klamav in Kubuntu for exampe). The error messages you see are X Org related and nothing to do with clamav.
** Changed in: clamav (Ubuntu) Status: Unconfirmed => Rejected -- Falied to install correctly https://launchpad.net/bugs/94974 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs