Today Microsoft had launched the all new, much hyped, and most of all, free antivirus software, dubbed Microsoft Security Essentials (MSE). It is available for Windows XP, Vista and 7; in both 32-bit and 64-bit.
Last June, Microsoft had initially launched the beta version, and responses are mostly positive. Even AVG Technologies stated that MSE is an ideal free antivirus for Windows users.
MSE replaces Windows Live OneCare (once a free antivirus which failed to capture the market) and Windows Defender (which only deal with spyware and malware).