Google researcher Tavis Ormandy’s public disclosure Thursday of a security flaw in Microsoft’s Help and Support Center has drawn harsh criticism from Redmond. The flaw, which exists in Windows XP and Windows Server 2003, could let hackers remotely execute code on victims’ computers. Microsoft is angry that Ormandy publicly disclosed a proof of concept exploit of the flaw just four days after privately notifying the company of the flaw’s existence. Ormandy posted his findings and the proof of concept exploit of the Help and Support Center flaw on the Full Disclosure website Thursday.