I need to download some programs to dvd for a friend's computer. I am considering Avast free and SpywareBlaster. Does anyone know if there is a conflict between these two programs? She'll also probably leave Windows Defender enabled (not sure though) and most likely the Vista firewall enabled. That's unless she finds a nice deal on a suite somewhere. Also considering SAS free download and maybe a few other things (ie7pro, ccleaner, etc). This is going to need to remain a pretty simple Vista set up.