KB4598291 is an optional update for Windows 10 v2004 & v20H2. Here are the direct links to download KB4598291 offline installer.
Microsoft is starting this February 2021 with a new optional update for Windows 10 v2004 users. Being an optional update, Windows 10 will not install it automatically. You either have to manually trigger the update from the Settings app or download and install the KB4598291 offline installer. In fact, Microsoft already released the KB4598291 update once a few weeks back for Windows 10 v20H2 users. Now, the same fixes and improvements are coming to the v2004 users.
The KB4598291 itself is pretty small but fixes some important things in Windows. Some of them include but not limited to freezing when playing games on full screen, fix for incorrect daylight saving settings, problems with opening documents located on the desktop, issues with modifier keys when using Japanese keyboard layout, etc. All in all, this is a pretty small update that if you don’t need it, you don’t have to install it.
To install the update, open the Settings app, go to “Update & Security → Windows Update” and click on the “Check for updates” button. If your system is supported, Windows will download and install the KB4598291 update. To install the update on an offline machine or if the Windows Update is causing problems, use the links below to download KB4598291 offline installer.
Download KB4598291 Offline installer
To make things easier for you, I found the direct download links for KB4598291 for both Windows 10 32-bit and 64-bit systems. Depending on your system type, download the update using the below links and install it like any other Windows software. After installing, restart the system and you are good to go.
KB4598291 x86 (32-bit) offline installer (download size: 140.8 MB)
KB4598291 x64 (64-bit) offline installer (download size: 415.3 MB)
If you want KB4598291 download links for Windows Server, ARM64 based systems, or v20H2 then go to the Microsoft update catalog website to find the appropriate links. All you have to do is click on the Download button next to the appropriate version.
Updates an issue that causes a device to stop responding when you play a game in full-screen or tablet mode.
Updates an issue with using Ctrl+Caps Lock and Alt+Caps Lock to switch to Hiragana or Katakana mode respectively after upgrading to Windows 10, version 2004.
Updates an issue that prevents you from opening a document that is on the Windows desktop.
Updates an issue that creates duplicate cloud provider folders in the File Explorer navigation pane.
Updates an issue with some special key combinations used in DaYi, Yi, and Array IMEs that might cause an application to stop working.
Updates an issue that displays a blank lock screen after a device wakes up from Hibernate.
Corrects historical daylight savings time (DST) information for the Palestinian Authority.
Updates an issue that incorrectly deactivates some Windows 10 Education devices after upgrading to Windows 10, version 2004.
Updates an issue that might cause the Alt+Tab order to change unexpectedly and cause you to switch to the wrong window.
Updates an issue that fails to show Extract all on the shortcut menu when you right-click an online-only ZIP file.
That is it.