Microsoft released new microcode updates for Windows 10, these updates are intended to close various security hole variants such as Specter and Zombie-Load. The security leaks affect Intel processors, especially older ones.
The updates is targeted at various CPU series, e.g. Denverton, Sandy Bridge, Sandy Bridge E(P), Valley View and Whiskey Lake U. At the same time, the updates are offered for several Windows versions, starting with the current build 1909 down to 1507. Important: The updates are very specific and may only be installed in connection with processors that Microsoft lists in the respective support articles.
If you are unsure, you can use tools like CPU-Z to find out which CPU you are using.
- Windows 10 version 1903/1909: KB497165 ( download )
- Windows 10 version 1809: KB4494174 ( download )
- Windows 10 version 1803: KB4494451 ( download )
- Windows 10 version 1709: KB4494452 ( download )
- Windows 10 version 1703: KB4494453 ( download ) Download )
- Windows 10 Version 1607: KB4494175 ( Download )
- Windows 10 Version 1507: KB4494454 ( Download )
These microcode updates do not appear as part of the cumulative Windows updates, but must be downloaded separately.
Microsoft offers microcode updates for Intel processors