Spyware and viruses: What's the difference?

Spyware and viruses are both malicious software, but they're different.Learn how, and how Microsoft Security Essentials can help protect you from both. Then find answers to these common questions about Microsoft Security Essentials: Do I still need Windows Defender? Do I need another antivirus program, too? Suspect you have a virus? Get help fast at our newVirus and Security Solution Center, and learnsteps that you can take to help remove it.