Thanks, both of you.
I had never heard of BullGuard before, and because of the all-in-one function I was pretty happy about it, but it already happend a few times that when I shut down the computer I get the message that BullGuard isn't reacting, but when I open it, it works just fine. Really weird, but with those other programs, I can just uninstall BullGuard and install the new ones.