Bit defender was once a good product, but starting with Internet Security 10 (and definitely with IS 11), it has goon straight down hill. IS 10 had problems that the company was aware of back in 11/8 (as shown on their own forum). IS 10 would just shut down, so unless you noticed the grayed out icon in your tray bar, you thought you were protected, but weren't. IS 11 was supposed to fix that problem, but it slowed my computer so much that it was basically unusable. They were also aware of this problem and have suggested everything to fix it except fixing their software. I wasted a 3 yr license ($100+) and have stopped using the product.