To protect your computer, you should install anti-virus software and firewall. They can keep you away from virus and spyware.
But you need to take care when you reading email, download software and surfing the web.
1. Think before opening any email attachment
If you don’t know the sender, don’t open the attachment and delete it.
If it is from someone you know, you should scan the attachment before opening it.
2. Watch out what you download
Always download the files from their publisher. You should scan the downloaded file before running it.
3. Stay away from pornographic and illegal software sites
Pornographic or software crack site are often loaded with spyware or virus. If you want to pick up viruses and spyware quickly, visit some pornographic web sites. A mis-click on the popup may make your machine infested with spyware, dialer or virus.