Internet PC Networking

Google has just released an open source browser - Google Chrome. It is now available at http://www.google.com/chrome. As with other Google application, it is available freely to the public.

In my tests, Chrome performed excellent in access to Gmail, Blogger page and so on. Each time launching a new tab, Chrome will show a customised homepage [...]

It depends.
If you have budget constraint, you may like to try anti virus free software. I have been using AVG Free Anti-Virus software for years. It works really fine so far.

Updates are always available. AVG Free Anti-Virus can be downloaded from http://free.avg.com/.