Error messages in Avast free edition!

The version is 1.3.0. The first two screen shots are what I first got, about a month ago, when I ran a scan and attempted to update the database. The third screenshot is what I got today.

Hi,

Just go through: http://forum.avast.com/index.php?topic=77063.msg638307#msg638307

Hallo, your system has insufficient SHM memory settings, just change them using sysctl (see the sticky post in this forum).

regards,
pc