1. Microsoft Built in Protection
(Learn/Antivirus)

...  Restrictive installation to alert you — In previous versions of Windows, malicious programs were able to do downloads and installations without your knowledge. In Vista, every time a software installation ...

2. Computer Protection
(Learn/Antivirus)

... that works better in theory than practice. When viruses are detected, the software can usually fight the infection by removing the malicious code, usually without much loss of data. Sometimes it won't ...

3. About Worms
(Learn/Antivirus)

... help with, or malicious web pages or email messages, from other machines that are infected.   Worms, on the other hand, hardly ever do anything noticable to your computer except slow it down and ...