Microsoft patched all of its currently supported systems to fix the flaw back in March, but now there's an update available for unsupported systems too, including Windows XP, Windows 8 and Windows Server 2003, which you can grab here (note: if that link isn't working then there are direct download links available in the Security blog post).
Of course, for home users, if you're still running one of those old operating systems then yes, you should patch immediately -- and follow up with an upgrade to something current.
If you are longing to try Windows 8.1, you can now learn from other people's lessons and upgrade safely!
Once a month on Patch Tuesday, Microsoft releases cumulative updates to all Windows users.
That was one of the biggest announcements at the Build Developer Conference. Windows 8.1 users are eligible for the free upgrade to Windows 10.
Windows 8.1 will be in mainstream support until January 2018, and will continue to receive security updates in extended support until January 2023.On newer versions like Windows Vista, 7, 8.1 and 10, the March update tagged MS17-010 addresses the vulnerability it's exploiting (that was revealed earlier this year by "The Shadow Brokers" when they leaked a stolen cache of NSA tools).While it's not confirmed how the initial infections occurred, it's believed the trojan horse was spread by email phishing links that drop the "Eternal Blue" exploit released by The Shadow Brokers, as well as the Wanna Crypt malware variant. After July 29, Windows 7 and 8.1 users will no longer be eligible to upgrade to Windows 10 for free.If you’ve decided that you don’t want to upgrade to Windows 10, no matter what, you can ignore the warnings from Microsoft and stay on your current operating system (OS). Let’s take a quick look at what will happen to the various flavors of Windows after the end of July.We wouldn't count on the NSA or other agencies heeding the call, but Microsoft clearly wants to make its frustrations heard.