I just bought this kaspersky internet security (was using Avast + Comodo which is good, but going for kaspersky since I saw a lot of good review).

K I use it. The problem is going on, as well for everyone having problem in the forum posting about it too.

I'm going to have a review about it.

Good thing about it is :-

1. Nice GUI
2. Fast scanning
3. Fast acting (the moment you load a webpage with virus it stop it which I never see before in other Antivirus program).

Tat's all about it lol

Bad thing is much more:-

1. Very bad firewall. Configuration is not user friendly like the Comodo.
2. Best detection? Well, I don't know. It work like how the free Avast did, with more annoying pop up than Avast.
3. Application like Firefox 3 (experience hang, i got it fixed, which you have to reset everything in the firewall, and it will repeat again which i don't know when it will)
4. Some other internet-related program like FDM (FreeDownloadManager) not working flawlessly with the program. It just block some of my download.
5. Helkern.worm attack pop up randomly, seem like this is a popular pop up (I have two computer, they pop up just the same, I guess this goes with everyone else) and I don't really like it, it's like making us believing this antivirus actually doing it work! LOL.

In my opinion, it was way more smoother using Avast + Comodo.
Haven't tried the Avira (the download jump to Top 4 in Download.com beating Avast).