On Sun, 15 Sep 2013, TOM WALKER wrote to ED VANCE:

re: AVAST! updates

 TW> I ndid that for many years but soem tiem basck set it to Notify 
 TW> only so I could upgrade o nMY schedule instead of theirs. That 
 TW> saves the time of checking, Which takes a while on my SLOW DSL 
 TW> line, and then finding no upgrade avilable.

 TW> Right click and open Avast User Interface and go to 
 TW> Settings/Update and check "Ask when Update Avilable"

one can also adjust the default every four hour check to make it shorter or longer ;)

)\/(ark