Windows 11 KB5021255, KB5021234 cumulative update released

Microsoft released cumulative Windows 11 KB5021255, KB5021234 updates for Windows 22H2 and 21H2 versions 22H2 and 21H2 in order to address security flaws and fix 29 bugs.

Both KB5021255 & KB5021234 must be installed cumulatively. They contain the to fix vulnerabilities found in prior months.

This security update includes a fix to an which bypassed the Mark of the Web Security Warnings. Ransomware was installed on Windows computers by threat actors who exploited a flaw in the malware distribution campaign.

Windows 11 users are able to install the current update today by visiting Start> Setting > WindowsUpdate and clicking on “Check for Updates.”

Windows 11 KB5021255 cumulative update

Source: BleepingComputer

Windows 11 users have the option to manually download the update using the .

What’s New in Windows 11 KB5021255 Update

Windows 11 22H2 will now have its build number changed from 22621.963 to 22621.963 and 21H2 will become 222000.1335.

Windows 11 cumulative updates contain 29 fixes and improvements, including the nine highlights listed below.

  • This update fixes a known problem that could affect Task Manager. Some elements of the user interface (UI), might be displayed in unanticipated colors. It might be difficult to read parts of the UI. If you set “Choose your Mode” to “Custom” under Settings > Personalization > Colors, this issue may occur.

  • Now!Microsoft OneDrive customers will see storage alerts in the Settings app’s Systems page. These alerts will appear when your storage limit is near. If you need more storage, you can manage it and buy additional.

  • It’s now simpler to view the total storage of OneDrive subscriptions. You can see the total storage on the Accounts page of the Settings app.

  • NEW! For Windows Spotlight we combined them with Themes in the Personalization Page. It is now easier to find and activate the feature.

  • This fixes an issue that prevents some applications from opening in modern times.

  • This fix addresses an issue which might lead to certain applications not responding properly when you use Open File.

  • Microsoft has addressed a problem that may cause certain applications not to respond if you use the Input Method Editor. You can use keyboard shortcuts in order to modify the input mode for the IME.

  • Microsoft has fixed the problem of File Explorer not working after you close menu items and context menus.

  • This article addresses the year-end suspension of daylight savings time in Fiji.

Microsoft also made 20 other modifications to address these issues. The explains the details.