system
10
In my case it appears to create the log when i open the UI while not connected to the Internet
12/02/2011, 07:57:52 DnsQuery returned for: www.avast.com
12/02/2011, 07:57:52 DnsQuery returned for: www.avast.com
Probably get the same result if you have your firewall set to block AvastUI.exe