Windows Live OneCare
There were some in techdom who found it a bit ironic that Microsoft would get into the antivirus market, given that its products were the biggest targets for malware creators. Still others worried that Microsoft's dominance of the operating system market would give it an unfair advantage over rivals such as Symantec and McAfee.
None of that stopped the company from launching its antivirus software Windows Live OneCare in 2006. But OneCare didn't impress reviewers, such as those at CNET, or customers. Microsoft pulled the plug on the paid version of the software in 2008, though some of the technology still exists in its free Microsoft Security Essentials.