Microsoft Security Essentials (MSE) is a free antivirus software product created by Microsoft that provides protection against different types of malware such as computer virus, spyware, rootkits and trojan horses for Windows XP (IA-32), Windows Vista, and Windows 7 (both IA-32 and x64).It provides real-time protection for your home or small business PC that guards against viruses, spyware, and other malicious software.Microsoft Security Essentials is a free download from Microsoft that is simple to install, easy to use, and is automatically updated to protect your PC with the latest technology.
Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you want—without interruptions or long computer wait times.
Before installing Microsoft Security Essentials, we recommend that you uninstall other antivirus software already running on your PC. Running more than one antivirus program at the same time can potentially cause conflicts that affect PC performance.click below link to download.