NOT a good idea at all, as someone else here said.
Try this all-in-one suite:
http://www.trendmicro.com/en/product...e/overview.htm


lalinda@yahoonospam.com wrote:
> What I'm thinking of is using Avast as my main AV program (with it's
> multiple shields). Is there anyway of installing AVG or Avira free
> versions and not have it load as a startup program, so that it can be run
> as a 2nd AV check when necessary?
>
> I was thinking of a normal install (where they usually insinuate their
> dll's or exe files into resident memory), then using either MSCONFIG, Mike
> Lin's startup, or Process Explorer's Autorun utility to remove the process
> from running (or just do a regedit command myself). I would also check
> services to see if a service was added and change it from AUTO to manual
> (or disable and run it when necesssary).