I have avast in my home comp... but as it let in some spyware I used the spybot S&D... so I wondered if it would be better to go with AVG and S&D... for the work one.. but is AVG made for win 2000?.. or should I go with avast..

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Avast Home Edition
With a skin-based interface Avast! is the friendliest antivirus software from our test. This can be a minus because using sophisticated skins can affect the memory usage. It has an interesting feature "VRDB". The aim of VRDB is to help when, despite all the security measures, a virus gets inside the computer and the files are infected. With the help of VRDB, it is possible to repair infected files (return them exactly to their original state). It has detected only 1 of the 2 major threats on the test computer.
You can download Avast home Edition from here.

AVG Antivirus
Offering a rock-solid protection AVG is THE BEST FREE ANTIVIRUS from this test. It has a very good definition update system,uses little system resources and a full time protection utility with "on-access" file scanner and e-mail scanner. The program doesn't tax your system when scanning or when running in the background and always proved effective in our tests. This app's interface can't be described as beautiful, yet it is mostly simple to navigate. During the full system scan it has detected both of our major threats on the test computer.
You can download AVG Free Antivirus from here.