As mentioned many times on here, you will be changing you AV as often as your underwear if the intention is to find a faultless AV solution (they all have failings, same with all things) find a decent one & there are a few & stay with it, unless you are a true out and out masochist - Installing & uninstalling an AV that goes deep into Windows will cause more problems with drivers etc unless you image back or reinstall Windows, or spend a fair bit of time searching for bits left over - The search will go on until the end of time, or even longer for the perfect AV /VPN/ etc, etc (in my humble opinion)