Comment 2 for bug 785707

Hello P.J., thanks for taking the time to file this bug report.

The relevant error is here:

Setting up clamav-freshclam (0.97+dfsg-2ubuntu1) ...
chown: invalid group: `clamav:adm'
dpkg: error processing clamav-freshclam (--configure):
 subprocess installed post-installation script returned error exit status 1

The adm group is always assumed to exist, as all system log files are generally owned by this group. Is it possible you deleted it from your system? You can check with

getent group adm

If it does not exist, you need to re-create it with

groupadd -g 4 adm

And then try

sudo dpkg-reconfigure -a

Or if you have removed clamav since this bug report, just try installing it again.

Closing as Invalid.