- February 2021 Security Updates release notes
- List of software updates for Microsoft products
- List of the latest Windows Updates and Services Packs
- Security Updates Guide
- Microsoft Update Catalog site
- Our in-depth Windows update guide
- How to install optional updates on Windows 10
- Windows 10 Update History
- Windows 8.1 Update History
- Windows 7 Update History
Microsoft Windows Security Updates February 2021 overview
Microsoft released security updates for all supported versions of the company's Windows operating system on the February 2021 patch day. Updates have been released for other company products such as Microsoft Office as well.
Our guide provides system administrators and home users with information on the released updates. It provides details on the released updates, links to official support articles, as well as information about known issues and download options.
Click here to open the January 2021 Patch overview if you missed it or want to revisit it.
The Microsoft Windows Security Updates February 2021
Download the following Excel spreadsheet that lists the released security updates for Microsoft's Windows operating system and other company products. Click on the following link to start the download: Security Updates 2021-02-10-065857am
Executive Summary
- Microsoft released security updates for all supported client and server Windows products.
- Microsoft released security updates for many other company products as well including Microsoft Office, Visual Studio, SysInternals, Skype for Business, DirectX, PowerShell, or Azure IoT.
- The legacy version of Microsoft Edge will run out of support after next month's Patch Tuesday. It will be replaced by the Chromium-based Edge browser.
Operating System Distribution
- Windows 7Â Â (extended support only): 5 vulnerabilities: 2 critical and 3 important
- CVE-2021-1722 -- Windows Fax Service Remote Code Execution Vulnerability
- CVE-2021-24094 -- Windows TCP/IP Remote Code Execution Vulnerability
- Windows 8.1: 6 vulnerabilities: 2 rated critical and 4 rated important
- CVE-2021-1722 -- Windows Fax Service Remote Code Execution Vulnerability
- CVE-2021-24094 -- Windows TCP/IP Remote Code Execution Vulnerability
- Windows 10 version 1809: 11 vulnerabilities: 2 critical and 11 important
- CVE-2021-1722 -- Windows Fax Service Remote Code Execution Vulnerability
- CVE-2021-24081 -- Microsoft Windows Codecs Library Remote Code Execution Vulnerability
- Windows 10 version 1903 and 1909: 10 vulnerabilities: 3 critical and 7 important
- CVE-2021-24081 -- Microsoft Windows Codecs Library Remote Code Execution Vulnerability
- CVE-2021-1722 -- Windows Fax Service Remote Code Execution Vulnerability
- CVE-2021-24094 -- Windows TCP/IP Remote Code Execution Vulnerability
- Windows 10 version 2004 and 20H2:Â 12 vulnerabilities, 2 critical, 10 important
- CVE-2021-1722 -- Windows Fax Service Remote Code Execution Vulnerability
- CVE-2021-24081 -- Microsoft Windows Codecs Library Remote Code Execution Vulnerability
Windows Server products
- Windows Server 2008 R2 (extended support only): 5 vulnerabilities: 2 critical and 3 important
- CVE-2021-1722 -- Windows Fax Service Remote Code Execution Vulnerability
- CVE-2021-24094 -- Windows TCP/IP Remote Code Execution Vulnerability
- Windows Server 2012 R2: 6 vulnerabilities: 2 critical and 4 important
- CVE-2021-1722 -- Windows Fax Service Remote Code Execution Vulnerability
- CVE-2021-24094 -- Windows TCP/IP Remote Code Execution Vulnerability
- Windows Server 2016: 9 vulnerabilities: 3 critical and 6 important.
- CVE-2021-24081 -- Microsoft Windows Codecs Library Remote Code Execution Vulnerability
- CVE-2021-1722 -- Windows Fax Service Remote Code Execution Vulnerability
- CVE-2021-24094 -- Windows TCP/IP Remote Code Execution Vulnerability
- Windows Server 2019: 11 vulnerabilities: 3Â critical and 8 important.
- CVE-2021-24081 -- Microsoft Windows Codecs Library Remote Code Execution Vulnerability
- CVE-2021-1722 -- Windows Fax Service Remote Code Execution Vulnerability
- CVE-2021-24094 -- Windows TCP/IP Remote Code Execution Vulnerability
Windows Security Updates
Windows 7 SP1 and Windows Server 2008 R2
- Monthly Rollup: KB4601347Â
- Security-only: KB4601363Â
Updates and improvements:
- Historical daylight saving time updates and corrections for the Palestinian Authority.
- Addressed an issue with German translations of Central European Time.
- Security updates.
Windows 8.1 and Windows Server 2012 R2
- Monthly Rollup:Â KB4601384Â
- Security-only: KB4601349Â
Updates and improvements:
- Historical daylight saving time updates and corrections for the Palestinian Authority.
- Addressed an issue with German translations of Central European Time.
- Security updates.
Windows 10 version 1809
- Support Page: KB4601345
Updates and improvements:
- Fixed a "possible elevation of privilege vulnerability in the win32k component".
- Security updates.
Windows 10 version 1903 and 1909
- Support Page: KB4601315Â
Updates and improvements:
- Fixed a "possible elevation of privilege vulnerability in the win32k component".
- Security updates.
Windows 10 version 2004 and 20H2
- Support Page: KB4601319Â
Updates and improvements:
- Fixed a "possible elevation of privilege vulnerability in the win32k component".
- Fixes an issue that could damage the file system after running chkdsk /f.
- Security updates.
Other security updates
KB4601348 -- 2021-02 Security Monthly Quality Rollup for Windows Embedded 8 Standard and Windows Server 2012
KB4601366 -- 2021-02 Security Only Quality Update for Windows Server 2008
KB4601331 -- 2021-02 Cumulative Update for Windows 10 Version 1507
KB4601330 -- 2021-02 Cumulative Update for Windows 10 Version 1703
KB4601354 -- 2021-02 Cumulative Update for Windows 10 Version 1803
.NET
KB4600944 -- 2021-02 Security and Quality Rollup for .NET Framework 4.8 for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
KB4600945 -- 2021-02 Security and Quality Rollup for .NET Framework 4.6 for Windows Embedded Standard 7, Windows 7, Windows Server 2008 R2, and Windows Server 2008
KB4601048 -- 2021-02 Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 8.1 and Windows Server 2012 R2
KB4600957 -- 2021-02 Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Embedded 8 Standard and Windows Server 2012
KB4601057 -- 2021-02 Security and Quality Rollup for .NET Framework 4.8 for Windows Embedded 8 Standard and Windows Server 2012
KB4601058 -- 2021-02 Security and Quality Rollup for .NET Framework 4.8 for Windows 8.1 and Windows Server 2012 R2
KB4601089 -- 2021-02 Security Only Update for .NET Framework 4.8 for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
KB4601090 -- 2021-02 Security Only Update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Embedded Standard 7, Windows 7, Windows Server 2008 R2, and Windows Server 2008
KB4601091 -- 2021-02 Security Only Update for .NET Framework 4.8 for Windows Embedded 8 Standard and Windows Server 2012
KB4601092 -- 2021-02 Security Only Update for .NET Framework 4.8 for Windows 8.1 and Windows Server 2012 R2
KB4601093 -- 2021-02 Security Only Update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Embedded 8 Standard and Windows Server 2012
KB4601094 -- 2021-02 Security Only Update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 8.1 and Windows Server 2012 R2
KB4602958 -- 2021-02 Security Only Update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
KB4602959 -- 2021-02 Security Only Update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded 8 Standard and Windows Server 2012
KB4602960 -- 2021-02 Security Only Update for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 8.1 and Windows Server 2012 R2
KB4602961 -- 2021-02 Security Only Update for .NET Framework 4.6 for Windows Server 2008
KB4603002 -- 2021-02 Security and Quality Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
KB4603003 -- 2021-02 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded 8 Standard and Windows Server 2012
KB4603004 -- 2021-02 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 8.1 and Windows Server 2012 R2
KB4603005 -- 2021-02 Security and Quality Rollup for .NET Framework 2.0, 3.0, 4.5.2, 4.6 for Windows Server 2008
KB4601050 -- 2021-02 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 20H2, Windows 10 Version 20H2, Windows Server, version 2004, and Windows 10 Version 2004
KB4601051 -- 2021-02 Cumulative Update for .NET Framework 4.8 for Windows Server 2016 and Windows 10 Version 1607
KB4601052 -- 2021-02 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1703
KB4601054 -- 2021-02 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1803 and Windows Server 2016 (1803)
KB4601055 -- 2021-02 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2019 and Windows 10 Version 1809
KB4601056 -- 2021-02 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 1909 and Windows 10 Version 1909
KB4601060 -- 2021-02 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows Server 2019 and Windows 10 Version 1809
KB4601887 -- 2021-02 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows Server 2019 and Windows 10 Version 1809
Known Issues
Windows 7 SP1 and Server 2008 R2
- Updates may fail if the machine does not support ESU.
- Certain operations may fail on cluster shared volumes with the error "STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)".
- Microsoft suggests to perform the operations from a process that has administrator privileges', or from a node that does not have CSV ownership.
Windows 8.1 and Server 2012 R2
- Certain operations may fail on cluster shared volumes with the error "STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)".
- Microsoft suggests to perform the operations from a process that has administrator privileges', or from a node that does not have CSV ownership.
Windows 10 version 1809
- Devices with Asian language packs installed may receive error "0x800f0982 - PSFX_E_MATCHING_COMPONENT_NOT_FOUND."
- Microsoft recommends uninstalling and re-installing recently added language packs, and installing the latest updates for the operating system. If that does not help, Microsoft suggests to reset the PC.
Windows 10 version 1903 and 1909
- System and user certificates may be lost when updating to a later version of Windows 10
- Microsoft recommends going back to the previously installed version of Windows.
- Games may not start or throw errors when using Discord's overlay while playing games.
- The issue is fixed in the latest Discord version.
Windows 10 version 2004 and 20H2
- System and user certificates may be lost when updating to a later version of Windows 10
- Microsoft recommends going back to the previously installed version of Windows.
- The correct Furigana characters may not be displayed when using the Microsoft Japanese Input Method Editor.
- Microsoft is working on a resolution.
- Games may not start or throw errors when using Discord's overlay while playing games.
- The issue is fixed in the latest Discord version.
Security advisories and updates
ADV 990001Â -- Latest Servicing Stack Updates
Non-security related updates
KB890830 -- Windows Malicious Software Removal Tool
Microsoft Office Updates
You find Office update information here.
How to download and install the February 2021 security updates
Most home devices running Windows will receive the security updates automatically thanks to the built-in automatic updating functionality of the operating system. Updates are also provided as direct downloads and via management systems such as WSUS.
Note: we recommend that you back up the system and important date before the installation of updates. Windows' own recovery functionality is not 100% reliable and it is always better to have an independent backup that you can restore should things turn out wrong during or after the installation of updates.
To run a manual update check, do the following:
- Select Start, type Windows Update and load the Windows Update item that is displayed.
- Select check for updates to run a manual check for updates.
Direct update downloads
Below are resource pages with direct download links, if you prefer to download the updates to install them manually.
Windows 7 and Server 2008 R2
- KB4601347 -- 2021-02 Security Monthly Quality Rollup for Windows 7
- KB4601363 -- 2021-02 Security Only Quality Update for Windows 7
Windows 8.1 and Windows Server 2012 R2
- KB4601384 -- 2021-02 Security Monthly Quality Rollup for Windows 8.1
- KB4601349 -- 2021-02 Security Only Quality Update for Windows 8.1
Windows 10 (version 1809)
- KB4601345 -- 2021-02 Cumulative Update for Windows 10 Version 1809
Windows 10 (version 1903)
- KB4601315 -- 2021-02 Cumulative Update for Windows 10 Version 1903
Windows 10 (version 1909)
- KB4601315 -- 2021-02 Cumulative Update for Windows 10 Version 1909
Windows 10 (version 2004)
- KB4601319 -- 2021-02 Cumulative Update for Windows 10 Version 2004
Windows 10 (version 20H2)
- KB4601319 -- 2021-02 Cumulative Update for Windows 10 Version 20H2
Additional resources
Summary
Article Name
Microsoft Windows Security Updates February 2021 overview
Description
Microsoft released security updates and non-security updates for all supported versions of the company's Windows operating system, client and server, as well as other company products such as Microsoft Office on the February 2021 Patch Day.
Author
Martin Brinkmann
Publisher
Ghacks Technology News
Logo
What mental age of reader are you targeting with the first sentence? 10?
Why not write an article on how to *avoid* upgrading from W10 to W11. Analogous to those like me who avoided upgrading from 7 to 10 for as long as possible.
If your paymaster Microsoft permits it, of course.
5. Rufus
6. Ventoy
PS. I hate reading these “SEO optimized” articles.
I used Rufus to create an installer for a 6th gen intel i5 that had MBR. It upgraded using Setup. No issues except for Win 11 always prompting me to replace my local account. Still using Win 10 Pro on all my other PCs to avoid the bullying.
bit pointless to upgrade for the sake of upgrading as you never know when you’ll get locked out because ms might suddenly not provide updates to unsupported systems.
ps…. time travelling?
written. Jan 15, 2023
Updated • Jan 13, 2023
This happens when you schedule a post in WordPress and update it before setting the publication date.
Anyone willing to downgrade to this awful OS must like inflicting themselves with harm.
I have become convinced now that anybody who has no qualms with using Windows 11/10 must fit into one of the following brackets:
1) Too young to remember a time before W10 and W11 (doesn’t know better)
2) Wants to play the latest games on their PC above anything else (or deeply needs some software which already dropped W7 support)
3) Doesn’t know too much about how computers work, worried that they’d be absolutely lost and in trouble without the “”latest security””
4) Microsoft apologist that tries to justify that the latest “features” and “changes” are actually a good thing, that improve Windows
5) Uses their computer to do a bare minimum of like 3 different things, browse web, check emails, etc, so really doesn’t fuss
Obviously that doesn’t cover everyone, there’s also the category that:
6) Actually liked W7 more than 10, and held out as long as possible before switching, begrudgingly uses 10 now
Have I missed any group off this list?
You have missed in this group just about any professional user that uses business software like CAD programs or ERP Programs which are 99% of all professional users from this list.
Linux doesn’t help anyone who is not a linux kid and apple is just a fancy facebook machine.
Microsoft has removed KB5029351 update
only from windows update though
KB5029351 is still available from the ms update catalog site
1. This update is labaled as PREVIEW if it causes issues to unintelligent people, then they shouldn’t have allowed Preview updates ot install.
2. I have installed it in a 11 years old computer, and no problems at all.
3. Making a big drama over a bluescreen for an updated labeled as preview is ridiculous.
This is probably another BS internet drama where people ran programs and scripts that modified the registry until they broke Windows, just for removing stuff that they weren’t even using just for the sake of it.
Maybe people should stop playing geeks and actually either use Windows 10 or Windows 11, but don’t try to modify things just for the sake of it.
Sometimes removing or stopping things (like defender is a perfect example) only need intelligence, not scripts or 3rd party programs that might mess with windows.
Windows 11 was a pointless release, it was just created because some of the Windows team wanted to boost sales with some sort of new and improved Windows 10. Instead, Microsoft cannot support one version well let alone two.
Windows 11 is the worst ugly shame by Microsoft ever. They should release with every new W11 version a complete free version of Starallback inside just to make this sh** OS functionally again.
motherboard maker MSI has recently released a statement regarding the “unsupported processor” blue screen error for their boards using Intel 600/700 series chipsets & to avoid the KB5029351 Win11 update:
https://www.msi.com/news/detail/MSI-On–UNSUPPORTED-PROCESSOR–Error-Message-of-Windows-11-Update-KB5029351-Preview-142215
check out the following recent articles:
Neowin – Microsoft puts little blame on its Windows update after UNSUPPORTED PROCESSOR BSOD bug:
https://www.neowin.net/news/microsoft-puts-little-blame-on-its-windows-update-after-unsupported-processor-bsod-bug/
BleepingComputer – Microsoft blames ‘unsupported processor’ blue screens on OEM vendors:
https://www.bleepingcomputer.com/news/microsoft/microsoft-blames-unsupported-processor-blue-screens-on-oem-vendors/
While there may be changes or updates to the Windows 10 Store for Business and Education in the future, it is premature to conclude that it will be discontinued based solely on rumors.
My advice, I left win 15 years ago. Now I’m a happy linux user (linuxmint) but there is Centos, Fedora, Ubuntu depending on your needs.
motherboard maker MSI has recently released new BIOS/firmware updates for their Intel 600 & 700 series motherboards to fix the “UNSUPPORTED_PROCESSOR” problem (Sept. 6):
https://www.msi.com/news/detail/Updated-BIOS-fixes-Error-Message–UNSUPPORTED-PROCESSOR–caused-BSOD-on-MSI-s-Intel-700-and-600-Series-Motherboards-142277
I try to disable the Diagnostics Tracking Service (Connected Devices Platform User Services) but it wont let me disable it, any help will be greatly appreciated.
Tank you for your help