I only like Norman sand box. Any others, the product goes to the
trash bin.
In XP, Windows Firewall only blocks incoming connections, not
outgoing. In other words, you won't know what things are being sent
out when you are connected to the Net. A properly configured
firewall will prompt you about programs connecting to the
Net.
In Vista, the firewall works both way, but by default, outgoing
connections are not monitored. In effect, it's about the same as XP
Firewall... you need to configure Windows Firewall in order for it
to block certain programs connecting to the outside world or let it
notify you that something is trying to connect.
Whether to download 32-bit or 64-bit will depend on your OS
version. Most of us are using 32-bit OS.
If unsure, download the 64-bit and run it. If you get an error,
means your OS is 32-bit. 32-bit programs can't run a 64-bit
program, but a 64-bit program can run a 32-bit program (generally,
some programs can be very idiotic).