I have read that Avast doesn't block, etc., but I'm having big problems.
I have a Vista Home Premium HTPC. After about 15 minutes of using the internet, the internet stops working. If I close down firefox, it stays active in the processes menu of Task Manager. I can neither end the process or open up a new firefox window - i just get the "firefox is still running, please close it down" pop-up. Sometimes I'll be able to access the internet through IE for a short time afterwards, but eventually that also stops accessing the net, as does every other application (vista update, media center, etc.).
When this happens, I'm also unable to transfer files to/from my other PC, which stops showing up in Vista's Network window. If i try to shut down my PC, it takes about 5 minutes to shut down.
It's been like this since I built the PC a few months ago.
However, if I stop on-access protection before the internet freezes up, everything works absolutely fine indefinitely.
I have the same combination of Avast and ZoneAlarm on my other (XP) PC, and get none of these problems. I'd rather stick with Avast than change to another anti-virus software, but I've so far been unable to find a solution.
Anyone have any ideas?