Microsoft provides protections from vulnerability Spectre Variant 4

As part of the planned June 2018 Patch Tuesday Microsoft added protections from an additional subclass of speculative execution side channel vulnerability known as Speculative Store Bypass (CVE-2018-3639).

Fake Spectre and Meltdown patch spreads Smoke Loader malware

Cyber-criminals used the fake website of the German Federal Office for Information Security (BSI) to distribute Smoke Loader malware disguised as security patches for Meltdown and Specter.

No more Windows security updates for devices with incompatible antiviruses

Microsoft has added important note on the support page describing incompatibilities between antivirus (AV) products and the recent Windows Meltdown and Spectre patches.

Performance impact of Spectre and Meltdown patching on Windows Systems

Windows 7 and Windows 8 users running older processors will be most affected by performance issues.