KB5004296 improves performances of Windows 10 21H1 & 20H2

Microsoft releases an optional update ‘KB5004296’ that boosts performances of Windows 10 versions 21H1, 20H2, and 2004. Downloading and applying this non-security patch will increase the existing OS Build numbers of the above versions to 19043.1151, 19042.1051, and 19041.1051 respectively.

As usual, this update is available via both Windows Update and Microsoft Update Catalog. Since this is an optional one, you have to manually download and install it on your computer. Let’s explore its key highlights in detail –


KB5004296 Changelog

Here are the key fixes and improvements that you will get after installing this optional update –

No more Windows Timeline Sync Feature

Microsoft is now retiring the Timeline sync feature starting with Windows 10 Build 1904X.1151. This implies, moving forward, your PC won’t receive any support and thus you simply lose the ability to sync across different devices. 

For those who don’t know anything about it, this was basically a sync feature in which you can keep a track of all your activities across different Windows devices.

File Explorer Improvements

  • Users may now map to a network drive without worrying about File Explorer losing focus.
  • Works upon a File Explorer issue wherein it stops working the moment it reaches 99% while deleting files on a mapped network drive.

Group Policy Fixes

  • Resolves a timing issue on the Group Policy Registry Telemetry. Because of this timing issue, Group Policy extensions were earlier processing to fail.
  • Adds a new policy that creates generic strings and removes branding-specific terms, such as “Windows” or “PC”, for IoT Enterprise editions. For example – ‘Computer’ becomes ‘device’, or ‘Getting Windows ready’ will now appear as “Getting things ready”. 

MDM Fixes and Improvements

  • Improves Mobile Device Management (MDM) so that it doesn’t fail to correctly apply certain junk mail rules.
  • Resolves an anomaly that always reports the update build revision (UBR) as zero (0) on a device during enrollment to an MDM service.
  • Earlier, when a device is enrolled in an MDM service and ‘MDMWinsOverGP’ is enabled, this generates an error that repeatedly rebuilds the Windows Filtering Platform (WFP) filters. 

Network Improvements

  • Restricts “Network Internal Access” appearing on the taskbar thus it can’t have the information from certain domains.
  • The Network Connectivity Status Indicator (NCSI) should now correctly detect internet connectivity when you connect your device using a virtual private network (VPN).
  • Fixes a bug that causes printing to stop or prints the wrong output. The problem used to occur when you use a USB connection after updating to Windows 10, version 2004 or later.
  • Resolves an issue that prevents you from accessing a network drive that maps to a Distributed File System (DFS) root after you sign out.
  • Addresses an issue on Windows Network File System (NFS) client that may prevent you from renaming a file after mounting an NFS share. This issue occurs if you rename a particular file using File Explorer, however, does not occur if you rename the file using a command line.

Remote Desktop Fixes

  • Earlier, the RemoteFX USB displays as “Remote Desktop Generic USB Device” instead of the actual device name. The company has resolved this bug on Windows 10 21H1, 20h2, and 2004 versions.

Gaming Improvements

  • Earlier, when you press the trigger button while playing games, an issue occurred that beeps the sound very loud. 
  • You may now use lower frame rates while playing games on Windows 10 PC. This will increase performance thus making power plans and Game Mode working as expected. 

Error Fixes

  • Works upon an anomaly in which Set-RDSessionCollectionConfiguration fails to set the below custom property –
    •  camerastoredirect:s:value
  • Resolves an issue that causes the enrollment of the Elliptic Curve Digital Signature Algorithm (ECDSA) certificate to fail with the error, “0x80090027 NTE_INVALID_PARAMETER”. This issue occurs when the Trusted Platform Module (TPM) provider (the Microsoft Software Key Storage Provider) stores the key.
  • Works upon an issue that prevents the Windows Server service from starting if SrvComment is greater than 128 characters.
  • Addresses a rare issue that might degrade performance in applications that call Gdiplus.dll!GdipMeasureString in a tight loop with a new font on each call. This issue occurs after installing Windows updates released on and after February 2021.

Other Fixes and Improvements

  • Works upon an issue that causes System Integrity to leak memory.
  • Improves gaming services so that you can start and play any games on your desktop. 
  • Resolves an issue with SearchIndexer. Earlier, it continues to hold handles of the user’s search database even when they sign out of their PCs. 
  • Addresses the issue wherein you can’t enter text using an Input Method Editor (IME). Those who have set the power options to shut down a laptop by closing its lid may still encounter this issue. 
  • Corrects an auditing issue wherein events like 4624 or 5142 display a wrong event template while Dutch is the display language. 
  • Improves the Storage Sense page on Settings so that it correctly report the size of storage devices that use the GUID Partition Table (GPT). As this issue was not experienced by users on a master boot record (MBR), it remains unchanged. 
  • Improves Audio issues wherein it routes some audio channels when streaming using certain fixed channel layouts.
  • Addresses an issue with an unhandled Open File dialog critical exception. As a result, Microsoft Foundation Class (MFC) applications might close unexpectedly.
  • Resolves a Local Security Authority Subsystem Service (LSASS) domain controller memory leak that is reported in Privileged Access Management (PAM) deployments.
  • KB5004296 addresses an issue that prevents access to files on a Server Message Block (SMB) share when you enable Access Enabled Enumeration (ABE).
  • Rectifies an issue that prevents you from reconnecting to mapped network drives after you sign in and displays an access denied error. This issue occurs if you use the net use /deep option to create multiple drive mappings to different paths on the same encrypted file share.

Known Issues on KB5004296

There are no new issues that will occur after installing this non-security update. 

How to Get KB5004296 update

Go to Settings > Update & Security > Windows update, and hit check for updates. The system will then search for any available updates online. In case this finds any pending update for your computer, this will install that into your device. 

If you are not getting this cumulative update via the above method, either wait for a few more hours or simply download and install the KB5004296 update manually. In this method, you may download the respective standalone package, and install it on your device by double-clicking over it. 

Read on how to manually download and install Windows 10 updates.

Release NoteUpdate History

Tip: If you are facing update, activation, or driver issues on your Windows PC, try RESTORO PC Repair Tool. This software will scan your device for potential issues and resolve them automatically.