Microsoft started rolling out a new software update for Windows 10 systems to apply mitigations against the Spectre attacks. The latest security advisory published by Microsoft enables the mitigation, on certain devices. Microsoft is enabling Retpoline performance benefits only in Windows 10, version 1809 and later releases, the tech giant highlighted the complexity of the implementation and changes involved. The Spectre attack works on almost every system, including desktops, laptops, cloud servers, smartphones, as well as smartphones, and smartphones.”]
Source: https://securityaffairs.co/wordpress/81962/security/new-spectre-mitigations.html