It’s February Patch Tuesday, and Microsoft has released KB4601319 as a cumulative update for Windows 10 20H2, Windows 10 Version 2004 and Windows 10 21H1 (Dev). After installing this update, your Windows version will become 19042.804 for 20H2, 19043.804 for 21H1 and 19041.804 for Version 2004.
If you have not installed the recently released preview update KB4598291, you should go ahead with this update which should include all the updates included in the preview package.
Table of contents
- What's new in KB4601319
- Download KB4601319 cumulative update
- Uninstall KB4601319 using command-line
- Cleanup after installing Windows Updates
What’s new in KB4601319
As per the Microsoft Security Response Center, a total of 79 vulnerabilities have been addressed for Windows 10 Version 20H2 alone out of which 24 are deemed critical. These numbers are inclusive of the 32-bit, 64-bit, and ARM64 based systems.
In the case of Windows 10 Versions 2004, a total of 82 vulnerabilities have been addressed, out of which 24 are of critical severity.
Important matters addressed include remote code execution, elevation of privilege, information disclosure, denial of service, and security feature bypass.
Since v21H1 is still in the Dev channel, its addressed vulnerabilities have not been shared with the public. Nonetheless, since as all versions have the same core, it is likely that the same issues have been catered to.
The highlights of KB4598242 for Windows 10 are:
- Updates have been included to improve the verification of usernames and passwords.
- Updates have been included to enhance security when using external peripherals such as a mouse, keyboard, pen, etc.
Since all three versions of Windows 10 share the same functioning core, they share the same improvements as well. Let us see what KB4601319 brings to Windows 10 v21H1, v20H2, and v2004:
- A possible vulnerability has been addressed concerning the elevation of privilege in the win32k component.
- An issue resulting in some devices not being able to start up after running the chkdsk /f command has been fixed.
- Security updates have been made to the following components:
- Windows App Platform and Frameworks
- Windows Apps
- Windows Input and Composition
- Windows Cloud Infrastructure
- Windows Management
- Windows Authentication
- Windows Fundamentals
- Windows Cryptography
- Windows Virtualization
- Windows Core Networking
- Windows Hybrid Cloud Networking
An additional security vulnerability addressed in KB4601319 for Windows 10 v21H1 for Insiders concerns the prevention of applications that run as SYSTEM account from printing to “FILE:” ports.
For more elaborate information on KB4601319 for Windows 10 v20H2 and v2004, check out this Microsoft help page. For Windows 10 v21H1 refer here.
By the way, you can also figure out how to find and download the latest Windows 10 update.
Known issues in KB4601319
There are still a few issues with this update which Microsoft is aware of, and has provided some solutions to as well, for time being. Let us see what those are:
The updates for Windows 10 version v2004 and v20H2 may cause the system and user certificates to be lost when updating from Windows 10 v1809 or later, to a later version of the OS. Microsoft says this might only happen if that particular device has any Latest Cumulative Update (LCU) installed from September 16, 2020, or later. A workaround for this, as suggested by Microsoft, is to delete the update entirely, and then reinstall it (if you wish to) once the issue has been addressed. A guide to revert to the previous version has been discussed further down the article.
An issue with the update for v20H2 and v2004 is that users might have to enter the Furigana characters manually in the Microsoft Japanese Input Method Editor (IME), as automatically getting the Furigana characters would not be possible when entering the Kanji characters.
Both of the above-mentioned issues had been previously discovered, but Microsoft has been unable to resolve them thus far.
Another issue about v2004 and v20H2 is the incompatibility with Discord. A game might display an error or crash silently when using Direct3D 12 and the in-game overlay feature is enabled. Microsoft suggests that you turn off the feature till the issue is resolved at their end.
There are no publicly known issues for Windows 10 v21H1 as the Insiders still have to test this update and give their feedback to Microsoft.
Download KB4601319 cumulative update
Install KB4601319 using Windows Update
To install this update using Windows Update, please go to
Start Menu –> Settings –> Update & Security –> Windows Update. In the right-hand pane, click on the Check for updates button. You will then be able to see the update and should install it automatically.
Download offline installers for KB4601319
These updates can also be installed on any computer that has the relevant version of Windows 10, without having an internet connection. Download the offline installers below as per your Windows 10 version and platform requirements:
For Windows 10 Version 20H2
Download KB4601319 for Windows 10 Version 20H2 64-Bit [415.7 MB]
Download KB4601319 for Windows 10 Version 20H2 32-Bit [141.1 MB]
For Windows 10 Version 2004
Download KB4601319 for Windows 10 Version 2004 64-Bit [415.7 MB]
Download KB4601319 for Windows 10 Version 2004 32-Bit [141.1 MB]
To install the update, simply run the downloaded MSU file and Windows will automatically install the cumulative update. Unfortunately, a standalone ISO has not been made available for insiders to install.
You can check out your current Windows build by launching Run and then typing winver.
To download any other updates related to any of the above, please check the Microsoft Catalog.
Download KB4601319 Update CAB files
You can download the cumulative update CAB files from the links given below:
Download KB4601319 for Windows 10 20H2, 2004 and 21H1 64-bit devices
Download KB4601319 for Windows 10 20H2, 2004 and 21H1 32-bit devices
Download KB4601319 for Windows 10 20H2, 2004 and 21H1 ARM64 devices
Install KB4601319 CAB files
Microsoft is yet to release the MSU files for KB4601319. Once they are available, you can install the update using the Windows Update function to install this update automatically. However, if you want to install the update now, you will need to follow the steps below:
- Open PowerShell (Or Command Prompt) with administrative privileges.
- Run the following command:
dism /online /add-package /packagepath:c:\users\usman\downloads\Windows10.0-KB4601319.cab
Replace the file path with your own file path. I have renamed the CAB file for ease.
- Please wait until the package installation is 100% complete. The installation seems to be stuck at 20% but actually it is not. It will take some time to reach the 100% mark.
- Restart your computer by pressing Y.
You can check your Windows build by going to Run –> winver. This should show the updated build. Here is mine:
Uninstall KB4601319 using command-line
Since we have installed this update using Windows Update, it will not be listed in the list of updates but you can see it in the command line:
- Open Command Prompt (Run –> cmd)
- Run the following command:
wmic qfe list brief /format:table
- This will show all the updates installed on the computer. Make sure the relevant updates are on the list.
- To uninstall the update, run the following command
wusa /uninstall /kb:4601319
Restart your computer once the update is uninstalled.
Cleanup after installing Windows Updates
If you want to save space after installing Windows updates, you can run the following commands:
dism.exe /Online /Cleanup-Image /AnalyzeComponentStore
dism.exe /Online /Cleanup-Image /StartComponentCleanup
Is there any reason I cannot extract files from the cab using 7zip and then directly install the update?
I have used that for cab files for MS Word, and it seems to work fine.
You’ll need to use dism tool to install Windows update cab files. You can either use the command line tool or you can also use the dism GUI tool.