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SMBCheck (SMB stands for Server Message Block), is a nifty, lightweight, and straightforward utility that can tell you in mere seconds if your computer requires the MS17-010 patch.

If you don't know what the MS17-010 patch is all about, then note that it's been designed to address the following exploits of various version of Windows: CVE-2017-0143, CVE-2017-0144, CVE-2017-0145, CVE-2017-0146, CVE-2017-0147, and CVE-2017-0148.

In plain words, this official Microsoft patch represents a critical security measure against two of the most famous ransomware out there, WannaCrypt and WannaCry.

More to the point, Microsoft patched the vulnerabilities but only for Windows 10. Having said that, if you're running any other version besides or under Windows 10 at the current moment, it might be well worth using this tool in order to determine if your computer requires the MS17-010 or not.

And there's really no reason you shouldn't use it since it's incredibly lightweight and it does its job flawlessly almost instantly. Just download the application and simply launch it via its single executable file. After agreeing to the terms and conditions, you should be greeted by a bare-bones command line interface and information regarding the exact version of your computer's OS and if it requires the security patch in question.

Taking everything into account, SMBCheck is a useful application that provides useful insight on how well equipped your computer is for dealing with possible WannaCry ransomware attacks. It's recommended for all the versions of Windows, but mainly for Windows XP, Windows 7, and Windows 8 and 8.1.