MICROSOFT was forced to act quickly after more than 200,000 computers around the world were subject to a massive cyber attack.

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It came amid concerns networks were left vulnerable because they were still using outdated Windows XP software.

What is Microsoft's MS17-010 Windows patch?

Microsoft released a critical security patch update for Windows XP, Server 2003 and Windows 8 after systems were infected by ransomware, known as WannaCry, on May 12.

WannaCrypt - an earlier version of the malware - used previously leaked tools by the US's National Security Agency to exploit vulnerabilities in the Windows platform.

Microsoft patched the vulnerability using MS17-010 in March - but only for current platforms.

Therefore those running older systems, such as Windows XP, Windows 8 and Server 2003 weren't provided with a fix.

4012598 MS17-010: Description of the security update for Windows SMB Server: March 14, 20 March 2017 Security Monthly Quality Rollup for Windows 8.1 and Windows Server 2012 R2 4012213 March 2017 Security Only Quality Update for Windows 8.1 and Windows Server 2012 R2.

The Microsoft Security Response Center is part of the defender community and on the front line of security response evolution. For over twenty years, we have been engaged with security researchers working to protect customers and the broader ecosystem. Use the following table to check for any of the listed updates (except the ones marked as 'Does not contain MS17-010 patch'). If any of these is installed, MS17-010 is installed. Table 1 of 2: Windows 7 SP1 and later. The following rollup KBs contain the fix (except in the 'April Security Only 4B' column).

After the international attack, Microsoft changed its stance on 'end-of-life' patching and provided a mass fix, according to CSO Online.

The WannaCry ransomware affected more than 200,000 victims, including a fifth of the NHS trusts as well as other major global businesses.

How can you protect your PC from Wannacry ransomware?

Microsoft has urged anyone who hasn't already updated their system with the security update to do so immediately.

Individuals should also install any other software updates and switch on auto-updaters where possible.

Microsoft also recommends running its free anti-virus software for Windows.

Marcus Hutchins, 22, from Devon, has been hailed an “accidental hero” after he managed to stop the virus in its tracks by triggering a “kill switch”.

But there are other steps you should be taking to ensure you keep your information protected. These include:

• Ensuring you regularly back up your files by regularly saving copies in a completely separate system, such as an external hard drive.
• Never click on links you don't recognise or download files from people you don't know or trust.
• Install an anti-virus software and check for regular security updates.

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