The best defense against spyware is not to download it in the first place. Spyware is often installed on your computer when you visit an infected or malicious website. Therefore, you should exercise caution with links to websites from unknown sources. In addition, you should only download programs from trustful websites. If you are uncertain about a program you are considering downloading, conduct further research by analyzing reviews about the product. When downloading a specific program, ensure you’re not downloading pirated software. Spyware can be distributed by exploits that promote software piracy.