Web search group Google Inc is phasing out internal use of rival Microsoft Corp's Windows operating system because of security concerns following a Chinese hacking incident, the Financial Times reported on Tuesday. Citing several Google employees, the FT said the decision to move to other operating systems including Apple Inc's Mac OS and open-source Linux began in earnest in January after Google's Chinese operations were hacked. Internet security firm McAfee Inc said at the time the cyber attacks on Google and other businesses had exploited a previously unknown flaw in Microsoft's Internet Explorer browser, which was vulnerable on all recent versions of Windows. Google is developing its own operating system based on its Chrome browser.
