To protect against Malware, you need to act in two ways:
(1) Protect your PC:
* Use a good Anti-Virus Software.
* Make sure your firewall is enabled.
* Make sure your Operating-System is always updated.
(2) Stop the virus vectors:
* Do not visit illegal sites, or sites of a dubious nature.
* Do not use pirated software.
* Do not use peer to peer software, shared files often contain malware.
* Do not open email attachements without first scanning it.
* Set Up a **Seperate** PC for browsing only, this can be a "virtual PC" so that the image can easily be "restored" if does fall pray to malware.