Microsoft has released the updated version of its free anti-malware, Microsoft Security Essentials (MSE) 2.1.1116 for XP, Vista, and 7 available for both 32 bit and 64 bit Windows platforms.

The MSE provides real-time protection for your home PC guarding it against viruses, spyware, and other malicious software while running quietly in the background with any interruptions unless some critical action is required.