The tech company had stopped issuing updates and support for XP users form April 8, and said that the issuance of this update did not mean they were restoring support for XP.
"Windows XP is no longer supported by Microsoft, and we continue to encourage customers to migrate to a modern operating system, such as Windows 7 or 8.1. Additionally, customers are encouraged to upgrade to the latest version of Internet Explorer, IE 11," Microsoft said in a blog post.
The fix will update all users who have their automatic updates turned on, the company said on its security response page. Microsoft suggests that users turn on the feature by clicking on the "Check for Updates" button on the Windows Update tab of their Control Panel.
"For those manually updating, we strongly encourage you to apply this update as quickly as possible following the directions in the released security bulletin," said Dustin Childs from the response communications team.
Microsoft reveled earlier this week that a security flaw was allowing malicious hackers to get around security protections in the Windows operating system. The flaw was introduced when a user visited an infected site.
Many were quick to predict this as the end for Internet Explorer, which was once the most dominant browser in the market.
"I don’t expect a huge backlash on Internet Explorer’s market share," said Gartner security analyst Lawrence Pingree. "In fact, I think this helps drive adoption of upgrades to Windows 7 from XP."
The flaw got the Department of Homeland Security to ask its employees to stop using the browser until a fix was issued. According to Pingree, DHS issued that warning assuming that XP wouldn't get the patch, leaving its users with no alternative but to switch browsers.