Just my take Avast or Bitdefender do not justify not using Free Defender Ui , Bitdefender caused(for me) web pages slow down, I was double clicking way to often -Avast blocked my favorite streaming site( and going through the motions to get site allowed, not worth it, while on the other hand my computer works without a glitch with Defender Ui, sorry I am referring to Avast and Bitdefender paid products.