Kb5089549
The latest Kb5089549 coverage — news, analysis, and updates from the WindowsNews.AI desk.
KB5089549 Fixes Secure Boot Zero-Day Under Active Bootkit Attack
Microsoft pushed an emergency cumulative update for Windows 11 24H2 on June 9, 2026, patching a zero-day Secure Boot certificate vulnerability tracked as CVE-2026-112244. KB5089549 arrives outside...
Windows 11's Latest Security Update Can Fail Even If Your Drive Isn't Full — Here's Why
Microsoft's May 12, 2026 security update for Windows 11, KB5089549, is failing to install on some PCs with error 0x800f0922 — and the usual fix of clearing space on the C: drive won't help. The...
KB5089549 Fixes Windows 11 Explorer Freeze After Sign-In
Microsoft has released KB5089549, a cumulative update for Windows 11 versions 24H2 and 25H2, fixing a maddening bug that caused explorer.exe to freeze or crash immediately after sign-in, leaving the...
Windows 11 May 2026 Patch Tuesday KB5089549 Fixes 137 Security Flaws
Microsoft rolled out the May 2026 Patch Tuesday updates on May 12, delivering Windows 11 cumulative update KB5089549 for versions 24H2 and 25H2. The release plugs 137 security holes across the...
KB5089549 EFI Space Error 0x800f0922 Blocks Windows 11 24H2/25H2 Patch
Microsoft has acknowledged a significant installation issue with its latest Patch Tuesday update for Windows 11, KB5089549, causing failures on systems with limited free space on the EFI System...
Windows 11 Update KB5089549 Fails with 0x800f0922 Due to Low EFI Partition Space
Microsoft has confirmed that the Windows 11 security update KB5089549, released for versions 24H2 and 25H2, fails during installation on devices with critically low space on the EFI System Partition...
KB5089549 for Windows 11 Adds SecureBoot Folder to Automate UEFI Key Migration
Microsoft’s May 12, 2026 cumulative update for Windows 11, KB5089549, delivers a new and highly specific addition to the operating system: a C:\Windows\SecureBoot folder packed with PowerShell...
Microsoft Confirms C:\Windows\SecureBoot Folder is Safe, Part of KB5089549 Security Update
Microsoft has officially addressed the sudden appearance of a new C:\Windows\SecureBoot folder after installing the Windows 11 May 2026 cumulative update, KB5089549. The company confirms the folder...
KB5089549 Fixes BitLocker Recovery Bug, But Triggers EFI Space Warning for Windows 11
Microsoft's May 12, 2026 security update KB5089549 resolves a disruptive BitLocker recovery issue that began after April's boot-file modifications, but the fix now comes with a caution: devices with...
Windows 11 May Update Fails on Full EFI Partition: Microsoft Deploys Rollback Fix
Microsoft confirmed on May 15, 2026, that the May security update for Windows 11, KB5089549, is hitting an installation wall on devices running versions 24H2 and 25H2 when the EFI System Partition...
Windows 11 KB5089549 Update Fails or Slows Internet: Fix Now
Microsoft's latest Patch Tuesday release for Windows 11 is causing headaches for a subset of users who find the update either refuses to install or, paradoxically, slows their internet connection to...
Windows 11 USB Media Now Bundles May 2026 Cumulative Update KB5089549
Microsoft’s Media Creation Tool is now serving Windows 11 installation media that integrates the May 12, 2026 cumulative update KB5089549. This quiet refresh means anyone downloading the tool or...