An urgent alert was issued to Windows users last week with Microsoft pushing out a vital update to PCs across the world. This hugely important release fixed over 70 issues including some that were deemed "Critical" and three others that were handed the dreaded "Zero-day rating". That basically means hackers have already become aware of the glitches and are actively exploiting them in the wild.

One of the latest Zero Day bugs even gave hackers full system privileges and allowed them to run code on a machine without being logged in.

It's a serious problem and it highlights an even bigger nightmare for millions of Windows fans.

Microsoft recently announced that it was no longer supporting devices that are running Windows 8.1 or anything lower such as Windows 7.

This change to the Redmond firm's terms and conditions means no updates, new features or security patches will now be released to machines that have this software installed on them.

The fact that Microsoft has just fixed such serious issues with its Windows 10 and Windows 11 operating systems should have anyone using older versions seriously concerned as their PCs could remain extremely vulnerable to attacks.

"While you could continue to use a PC running Windows 8.1, without continued software and security updates, your PC will be at greater risk for viruses and malware," Microsoft warned.

"We recommend upgrading to a version of Windows that is still supported. A new device that can run Windows 11 makes for an easy transition and a great experience."