This free antiviral program provides all that you need to protect your computer, including a tool for scanning your hard drive and a real-time shield (the AVG Resident Shield) to prevent infections

This freeware includes three famous malware removal tools : Microsoft Malicious Software Removal Tool, McAfee AVERT Stinger and Trend Micro Damage Cleanup Engine.

There is no need to pay a monthly fee to an antivirus editor to protect your PC efficiently.