Guard your PC with a no-cost download for Windows that helps protect against viruses and costly security problems. Microsoft Security Essentials provides the latest technology to help protect your PC and the valuable information you store on it.

• Browse confidently: Help protect up to 10 PCs with the same core technology, backed by the world-class Microsoft Security Response Center.
• Get advanced protection: Against viruses, malware, spyware, and phishing attacks.
• Run software without hassle: With simple setup, easy-to-use interface, and automatic updates.
• Avoid expensive fixes: By helping to prevent problems caused by viruses and malicious software.