ubuntu clamav freshclam can't download main.cvd
Solution 1:
Had the same problem on Debian/KDE. I found this bug report which helped: simply edit freshclam.conf (kate /etc/clamav/freshclam.conf) and set ReceiveTimeout to something larger than 30.
For complete resolve there should be an error message that prompts you to do just that or a larger default value.
Solution 2:
Currently, every version from ClamAV 0.99 and down, including all patch versions, are unsupported, and are actively blocked from downloading new updates.