Last year, Microsoft announced that it was halting development of its highly regarded Windows Live OneCare product (see my review of Windows Live OneCare 2.0) and would instead release a free anti-malware solution codenamed Morro by the end of 2009. Morro, of course, became known as Microsoft Security Essentials (MSE), and as promised it is absolutely free and available to all genuine Windows XP, Vista, and 7 users, and will come in both 32-bit and 64-bit variants (32-bit only on XP).
