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Microsoft Issues WanaCrypt Patch for Windows 8, XP

Microsoft Corp. today took the unusual step of issuing security updates to address flaws in older, unsupported versions of Windows — including Windows XP and Windows 8. The move is a bid to slow the spread of the WanaCrypt ransomware strain that infected tens of thousands of Windows computers virtually overnight this week.

On Friday, May 12, countless organizations around the world began fending off attacks from a ransomware strain variously known as WannaCrypt, WanaDecrypt and Wanna.Cry. Ransomware encrypts a victim’s documents, images, music and other files unless the victim pays for a key to unlock them.

It quickly became apparent that Wanna was spreading with the help of a file-sharing vulnerability in Windows. Microsoft issued a patch to fix this flaw back in March 2017, but organizations running older, unsupported versions of Windows (such as Windows XP) were unable to apply the update because Microsoft no longer supplies security patches for those versions of Windows.

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