Free anti-malware tool from Microsoft

Microsoft security Essentials is a free anti-malware from Microsoft. It provides real time protection for your PC against malware, spyware, viruses and other malicious software free. It has features like
Scheduled scan
Quick, full and custom scan
Automatic updates without user interaction
Real-time protection
File exclusions
Microsoft SpyNet

It has four tabs:


Home tab which contains scan options like Quick Scan, Full scan and Custom scan. Quick scan scans critical areas of system like registry, start up etc. Full Scan scans the entire system and Custom scan is for scanning specific areas of system.

Update tab allows you to run a manual update of malware signatures.

History tab contains Quarantined items, detected items and items that are allowed to run.

Settings tab contains various settings of security essentials including Microsoft spynet membership settings.

Microsoft spynet is the online community that helps you choose how to respond to potential threats in case you don't know what to do. It is also responsible for preventing threats from spreading around.

System requirements:

• Genuine Windows XP, with a CPU clock speed of 500 MHz or higher, and 1 GB RAM or higher.
• Windows Vista and Windows 7 with a CPU clock speed of 1.0 GHz or higher, and 1 GB RAM or higher.
• VGA display with a resolution of 800 × 600 or higher.
• 140 MB of available hard disk space.
• An Internet connection is required for installation and to download the latest virus and spyware definitions for Microsoft Security Essentials.
• Internet browser( IE or Firefox) 

Download Microsoft security Essentials: