Today, Microsoft released a new cumulative update to users running Windows 10 build 16299. The update package KB4073291 raises the OS version to 16299.201.
The change log contain not that much information. Literally, it points that the update provides additional protections for 32-Bit (x86) version of Windows 10 1709 after you install January 3, 2018—KB4056892 (OS Build 16299.192).
However, it includes a number of know issues.
Known issues with KB4073291
Symptom
Windows Update History reports that KB4054517 failed to install because of Error 0x80070643.
Workaround
Even though the update was successfully installed, Windows Update incorrectly reports that the update failed to install. To verify the installation, select Check for Updates to confirm that there are no additional updates available.
You can also type About your PC in the Search box on your taskbar to confirm that your device is using the expected OS build.
Microsoft is working on a resolution and will provide an update in an upcoming release.
Symptom
When calling CoInitializeSecurity, the call will fail if passing RPC_C_IMP_LEVEL_NONE under certain conditions.
When calling CoInitializeSecurity, the call may fail when passing RPC_C_AUTHN_LEVEL_NONE as the authentication level. The error returned on failure is STATUS_BAD_IMPERSONATION_LEVEL.
Workaround
Change the authentication level parameter to RPC_C_AUTHN_LEVEL_CALL.
Microsoft is working on a resolution and will provide an update in an upcoming release.
Symptom
Due to compatibility issues with some versions of antivirus software, this update causes stop errors or abrupt reboots.
Workaround
Contact your antivirus (AV) vendor and follow their guidance.
Source: Microsoft.
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Where is the link, Sergey?
From the catalogue lookup I see only 32bit link
https://www.catalog.update.microsoft.com/Search.aspx?q=KB4073291
AFAIK, they have released this update only for 32-bit systems.
for x64 system
https://www.catalog.update.microsoft.com/Search.aspx?q=KB4073290
Thanks.