I have the Comodo Internet Security Complete ready to install but would like to try Avast free version antivirus instead of the one provided by Comodo. And I had a few questions. Is anyone else trying this combo? Are there any special tricks I should know for installation or use? Is it better to just use the av included in the Comodo suite instead of messing with a different av? I like Avast and I like the extra features of Comodo Complete for my laptop that always connects via wifi which is why I like the combo. My laptop's operating system is Vista Basic.