Microsoft is aware of detailed information that has been published about a class of vulnerabilities that are referred to as speculative execution side-channel attacks.
To learn more about the vulnerability, go to ADV180002.
How to obtain help and support for this security update
Help for installing updates: Windows Update: FAQ
Security solutions for IT professionals: TechNet Security Support and Troubleshooting
Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure
Local support according to your country: International Support