If you're running an earlier version of Windows, it's vital that you update it as soon as possible. Microsoft has warned about a critical security problem called BlueKeep that makes older Windows machines vulnerable to malware.
This vulnerability is technically known as CVE-2019-0708 and is found in Remote Desktop Services. It is a particular concern because the vulnerability is "worm", which means that if a computer is infected through this vulnerability, it can pass the malware to other computers. This is what allowed WannaCry malware to spread so quickly and so far in 2017.
Vulnerable systems include those running Windows 7, Windows Server 2008 R2, and Windows Server 2008. If, for some unknown reason, you are running Even in previous versions of Windows, such as Windows 2003 or Windows XP, your system is also vulnerable. (And now is a good time to remind you that you really should upgrade to Windows 10).
If you are running Windows 8 or Windows 10, then you should not worry, since the vulnerability will not affect it.  If you're wondering how many people are still running these old versions of Windows, you'd be surprised. Microsoft shared a recent report that estimates that almost one million computers connected to the Internet are vulnerable, and there could be many more vulnerable computers on corporate networks as well.
"You only need a vulnerable computer connected to the Internet to offer potential," wrote Simon Pope, Director of Incident Response at the Microsoft Security Response Center in a blog post. "This scenario could be even worse for those who have not updated their internal systems with the latest fixes, since any future malware can also try to exploit more vulnerabilities that have already been fixed. "
The solution for the vulnerability was published on May 14, so that users may not have updated yet, and although Microsoft says they have not yet detected a worm that makes use of this vulnerability, there is still a considerable risk that one will appear.
To encourage users to update, Microsoft noted It's been two months since the release of a fix the EternalBlue vulnerability and the time when WannaCry and other ransomware attacks they started using it That attack caused worldwide chaos, which is a good reminder of the importance of regularly updating your operating system.