Security and patch experts contend that Windows XP is still retired, still obsolete, still dead, even though Microsoft has arguably muddied the waters by issuing security updates two months running for the 16-year-old operating system.

"It's retired," said Amol Sarwate, the director of Qualys' vulnerability lab. "It's still obsolete."

Chris Goettl, product manager with patch management vendor Ivanti, concurred. "Windows XP is retired," Goettl said. "This is definitely unprecedented, but [Microsoft is] saying that this is not normal, and is not going to continue."

Questions about Windows XP's status -- dead or undead? -- surfaced in May when Microsoft distributed patches to the no-more-support XP, Windows 8 and Windows Server 2003. Those updates were issued to protect the trio from the fast-spreading "WannaCry" ransomware campaign.

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