VoIP's: Memory Use and Protection

My first question concerns VoIP’s extensive memory usage. There are several VoIP technologies available – Skype, Raketu, TokBox, Logitech Vid (proprietary to Logitech company) … and likely many more, or more to come.

The issue before my eyes is that these VoIP technologies occupy an extensive amount of memory; and the technologies ancillary to VoIP’s also occupy an extensive amount of memory – eg, my Logitech webcam promises to occupy nearly 1GB ram (i have not yet integrated it, but the accompanying literature recommends 1GB ram); add to this the extensive amount of memory occupied by Vista32’s necessary ancillaries; and add to this the memory occupied by Avast Pro and MBAM (real-time).

I am using 3.25 GB ram, but I suspect that even if I don’t open even a single IE8 window, I may still be looking at a paging condition with consequent crashing.

I am asking Avast’s Techs to respond to this.

Secondly, in connection with http://forum.avast.com/index.php?topic=27780.0, I assume that Avast can now fully protect against all these channels/technologies for intrusion?