Win Update KB5056579 Cumulative Update Preview .NET Framework 3.5 and 4.8.1 (24H2) - April 25



 Microsoft Support:

April 25, 2025 - KB5056579 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2​

The April 25, 2025 update for Windows 11, version 24H2 includes security and cumulative reliability improvements in .NET Framework 3.5 and 4.8.1. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.

Summary​

Security Improvements
There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements.

Quality and Reliability Improvements
.NET Libraries- Addresses an issue with concurrency in TypeDescriptor.GetConverter()issue in TypeDescriptor GetProperties() and GetConverter().
.NET Runtime- Addresses an issue where interactions between .NET Framework DLL loads and OS code integrity enforcement policy trigger error reporting dialog boxes.

Known issues in this update​

Microsoft is not currently aware of any issues in this update.

How to get this update​

Install this update

Release ChannelAvailableNext Step
Windows Update and Microsoft UpdateYesGo to Settings > Update & Security > Windows Update. In the Optional updates available area, you’ll find the link to download and install the update.
Windows Update for BusinessYesGo to Settings > Update & Security > Windows Update. In the Optional updates available area, you’ll find the link to download and install the update.
Microsoft Update CatalogYesTo get the standalone package for this update, go to the Microsoft Update Catalog website.
Windows Server Update Services (WSUS)NoYou can import this update into WSUS manually. See the Microsoft Update Catalog for instructions.

File information

For a list of the files that are provided in this update, download the file information for cumulative update.

Prerequisites​

To apply this update, you must have .NET Framework 3.5 or 4.8.1 installed.

Restart requirement​

You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.



 Source:

April 25, 2025-KB5056579 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 - Microsoft Support

support.microsoft.com support.microsoft.com
 
Click to expand...
KB5056579.webp
 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gbps Download and 35 Mbps Upload
    Browser
    Google Chrome
    Antivirus
    Microsoft Defender and Malwarebytes Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    CyberPower CP1500PFCLCD
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Surface Laptop 7 Copilot+ PC
    CPU
    Snapdragon X Elite (12 core) 3.42 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Monitor(s) Displays
    15" HDR
    Screen Resolution
    2496 x 1664
    Hard Drives
    1 TB SSD
    Internet Speed
    Wi-Fi 7 and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender
Ready to install...

1745607331294.webp
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Asus/Custom Build
    CPU
    Intel® Xeon® X5690 3.47GHz Six-Core
    Motherboard
    Asus P6T Deluxe v2
    Memory
    G.Skill PC3-12800 1600MHz 24GB
    Graphics Card(s)
    NVIDIA GeForce GTX 1050
    Sound Card
    SoundMAX ADI AD2000B HD Audio
    Monitor(s) Displays
    Acer T232HL Touch Screen
    Screen Resolution
    1920 x 1080 @ 60Hz
    Hard Drives
    6 Crucial MX500 SSD 1TB each.
    PSU
    Thermaltake Toughpower Gold 850W
    Case
    Thermaltake Armor VA8000SWA
    Cooling
    Thermaltake Air Cooling System
    Keyboard
    Illuminated Multimedia LED Keyboard
    Mouse
    M16 Dual Mode Illuminated Mouse - Bluetooth / 2.4 GHz Mode
    Internet Speed
    800 Mbps
    Browser
    Edge / Opera / Vivaldi / Chrome / Firefox / Brave
    Antivirus
    Windows Defender Security
Installed fine...

1745610421045.webp
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Asus/Custom Build
    CPU
    Intel® Xeon® X5690 3.47GHz Six-Core
    Motherboard
    Asus P6T Deluxe v2
    Memory
    G.Skill PC3-12800 1600MHz 24GB
    Graphics Card(s)
    NVIDIA GeForce GTX 1050
    Sound Card
    SoundMAX ADI AD2000B HD Audio
    Monitor(s) Displays
    Acer T232HL Touch Screen
    Screen Resolution
    1920 x 1080 @ 60Hz
    Hard Drives
    6 Crucial MX500 SSD 1TB each.
    PSU
    Thermaltake Toughpower Gold 850W
    Case
    Thermaltake Armor VA8000SWA
    Cooling
    Thermaltake Air Cooling System
    Keyboard
    Illuminated Multimedia LED Keyboard
    Mouse
    M16 Dual Mode Illuminated Mouse - Bluetooth / 2.4 GHz Mode
    Internet Speed
    800 Mbps
    Browser
    Edge / Opera / Vivaldi / Chrome / Firefox / Brave
    Antivirus
    Windows Defender Security
Not for me.
I have two updates - KB5056579, and KB5055634 which will not install on my system.
I keep getting the error: 0x800f0922 at the end of the process.
The installer always freezes at either 36% or 73%, then posts the message "Something went wrong... don't worry..."
The system restarts a couple of times, then the Windows login screen appears.

My Windows info:
Edition: Windows 11 Pro
Version: 24H2
Installed on: 2025-04-12
OS Build: 26120.3863
Experience: Windows Feature Experience Pack 100.26100.83.0

My system specs:
Device name Asus-Win11
Processor AMD Ryzen 7 3700X 8-Core Processor 3.60 GHz
Installed RAM 32.0 GB
Device ID xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Product ID xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
System type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display

I am signed up with Windows Insider Beta plan.

From what I have been reading, this bug has existed for quite a while.

Frank <Ultrarunner22>
 

My Computer

System One

  • OS
    Dual-Boot Windows 11 / Ubuntu 20.04.3
    Computer type
    PC/Desktop
    Manufacturer/Model
    Asus
    CPU
    AMD Ryzen 7 3700X
    Motherboard
    Asus Tuf Gaming X570 Plus WiFi
    Memory
    32GB DDR4 @ 3200MHz
    Graphics Card(s)
    Gigabyte GeForce RTX 2070 Super Windforce OC 3X 8G
    Sound Card
    OBD: Realtek S 1200A, USB: Behringer UMC202HD
    Monitor(s) Displays
    Main: Asus Tuf Gaming VG27AQL1A, #2: NEC EA244WMi, #3: Samsung 2494HS
    Screen Resolution
    2560 X 1440 @ 144Hz
    Hard Drives
    2ea WD Blue SN550 NVMe M.2 1TB SSD
    PSU
    Seasonic Focus GM-750
    Case
    Fractal Designs Meshify C (no glass)
    Cooling
    CPU: AMD Ryzen stock cooler, Case: 2x 140mm front, 1x 120mm rear, 1x 120mm top
    Keyboard
    Glorious GMMK with Pudding Keycaps
    Mouse
    UtechSmart Venus MMO Gaming mouse
    Internet Speed
    100Mb/s
    Browser
    Firefox ver 93.0 64-bit
    Antivirus
    ESET Internet Security Suite
Update:
I am getting very annoyed and frustrated.
I have tried everything to install the updates I listed above, but every time, I get to 36%, then there's the "Something went wrong..." message, and the same error code appears in the Windows update app.
I tried disabling ESET Internet Security for 4 hours, but once the computer reboots, ESET restores protection.
I do not believe that my AV software is responsible for this failure. This is a Microsoft issue.
It appears to me that I am going to need to download the latest build of Windows 11 Pro, format and reinstall the OS, then do all the updates before I install any apps - including Microsoft 365, which I own a subscription to.

Even though my normal user has admin privs (he is me), I have a separate Administrator account, so that is the next and last thing I will try.
If this doesn't work (and it won't), I am going to have to pause updates until MS can come up with a fix for this bug - and I am certain at this point that this is a bug.

I was only able to upgrade to Windows 11 pro version 24H2 a couple of weeks ago - after converting my boot drive from MBR to GPT and enabling Secure Boot (disabling compatability mode) in the BIOS.

All was fine until earlier this week when Windows wanted to install updates.
I allowed the updates, but was logged in as my regular user - with admin privs.
My last attempt at installing the latest updates is to log out of my user account and log in as the admin.
If that doesn't work...
I guess I'll have to create a Windows 11 Pro installation USB stick that has the latest Windows iso file. From there, maybe I can install the latest updates.

If all of that fails... honestly; I am going to defect to Linux.
 

My Computer

System One

  • OS
    Dual-Boot Windows 11 / Ubuntu 20.04.3
    Computer type
    PC/Desktop
    Manufacturer/Model
    Asus
    CPU
    AMD Ryzen 7 3700X
    Motherboard
    Asus Tuf Gaming X570 Plus WiFi
    Memory
    32GB DDR4 @ 3200MHz
    Graphics Card(s)
    Gigabyte GeForce RTX 2070 Super Windforce OC 3X 8G
    Sound Card
    OBD: Realtek S 1200A, USB: Behringer UMC202HD
    Monitor(s) Displays
    Main: Asus Tuf Gaming VG27AQL1A, #2: NEC EA244WMi, #3: Samsung 2494HS
    Screen Resolution
    2560 X 1440 @ 144Hz
    Hard Drives
    2ea WD Blue SN550 NVMe M.2 1TB SSD
    PSU
    Seasonic Focus GM-750
    Case
    Fractal Designs Meshify C (no glass)
    Cooling
    CPU: AMD Ryzen stock cooler, Case: 2x 140mm front, 1x 120mm rear, 1x 120mm top
    Keyboard
    Glorious GMMK with Pudding Keycaps
    Mouse
    UtechSmart Venus MMO Gaming mouse
    Internet Speed
    100Mb/s
    Browser
    Firefox ver 93.0 64-bit
    Antivirus
    ESET Internet Security Suite
Odd this update shows it was installed earlier this month already?
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom Built
    CPU
    Intel i9 14900KF
    Motherboard
    Asus z790 ProArt Creator WiFi
    Memory
    64GB Corsair Vengeance RGB
    Graphics Card(s)
    MSI 4090 Suprim X
    Sound Card
    Onboard
    Monitor(s) Displays
    1 x Asus 24". 1 x Asus 32"
    Screen Resolution
    1920x1080 & 2560 x 1440
    Hard Drives
    Multiple
    PSU
    Corsair 1200HX
    Case
    Corsair 7000D RGB
    Cooling
    Corsair H150I Capellix XT
    Keyboard
    Corsair K70 RGB MK.2
    Mouse
    Corsair M55 RGB Pro
    Internet Speed
    1000Mb/s
    Browser
    Edge
    Antivirus
    Windows Default
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