KLA11291
Microsoft Guidance for Lazy Floating Point State Restore

Speculative store bypass vulnerability in Microsoft Windows systems can be exploited to bypass security restrictions.

On January 3, 2018, Microsoft released an advisory and security updates related to a newly-discovered class of hardware vulnerabilities (known as Spectre and Meltdown) involving speculative execution side channels that affect AMD, ARM, and Intel CPUs to varying degrees.

On June 13, 2018, an additional vulnerability involving side channel speculative execution, known as Lazy FP State Restore, has been announced and assigned CVE-2018-3665.

Windows Server 2012 R2 (Server Core installation)
Windows 10 for x64-based Systems
Windows 8.1 for x64-based systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)