Windows XP: The end is nigh

The end-of-support deadline for Windows XP, heavily publicized since 2007, is upon us, and hundreds of millions of PCs still run the OS

When Microsoft ends support for Windows XP on Tuesday, a security sinkhole will likely open and gradually widen, threatening hundreds of millions of PCs worldwide in homes, companies, government agencies and schools.

Along with the Y2K bug, Windows XP's support termination is one of the computer industry's most publicized -- and most ignored -- deadlines, toward which many business and IT managers have taken a curiously casual attitude.

The implications could be dire for those organizations that continue to use Windows XP, a decrepit OS Microsoft launched in 2001, and whose bugs and security vulnerabilities it will no longer patch.

Microsoft hasn't minced words painting doomsday scenarios of malicious hackers and cybercriminals having a field day with Windows XP PCs, unleashing a barrage of malware, carrying out ransomware attacks, and stealing sensitive personal and financial data stored in those machines.

"Once support ends and the OS is no longer patched, the PC is at risk," said Tom Murphy, Microsoft's director of communications for Windows.

Microsoft set the fateful date almost seven years ago, and since then has been telling consumers and commercial customers with increasing urgency to upgrade from Windows XP, warning them that missing this deadline would put their PCs in serious danger.

And yet, while estimates vary, it's widely acknowledged that Windows XP still runs a substantial percentage of desktop and laptop PCs, and of other specialty computing devices, such as bank ATMs.

NetApplications recently said that as of February, Windows XP was on almost 30 percent of PCs, second only to Windows 7 with about 47 percent, and towering above the shiny new Windows 8 and 8.1 versions, with a combined 10.6 percent.

Surprisingly, the problem isn't exclusive to clueless home users.

"There's a pretty sizable installed base of Windows XP in the commercial sector," said Al Gillen, an IDC analyst.

Al Gillen, IDC analyst
Al Gillen, IDC analyst

IDC's latest estimate is that 30 percent of PCs in businesses of all sizes are on Windows XP. By the end of 2014, the percentage will be down to 20 percent, still a very large number, according to Gillen.

And the problem isn't limited to small companies with little to no IT knowledge and resources. In businesses with more than 500 employees, Gartner estimates that between 20 percent and 25 percent of PCs are on Windows XP. One-third of these medium-size and large companies have 10 percent or more of their PCs running the aging OS.

"There's a pretty large number of Windows XP machines in enterprises," said Michael Silver, a Gartner analyst.

Some had assumed that given the massive Windows XP installed base, Microsoft would budge and extend its support another year or two, but the vendor has stood firm, saying that the OS is simply too old and vulnerable to today's security threats, for which it wasn't architected.

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