known issue rollback

Microsoft has confirmed that its January 2026 Patch Tuesday updates for Windows 11 introduced multiple regressions and has already shipped targeted fixes to address the most disruptive problems, but mixed reports and unacknowledged reports mean administrators and power users must act carefully...

A routine Patch Tuesday release on January 13, 2026 has left a significant portion of classic Outlook users scrambling: the Windows 11 cumulative update KB5074109 and a separate Outlook Current Channel build have each introduced regressions that render parts of the traditional Outlook experience...

A routine January Patch Tuesday rollup (KB5074109) accidentally left parts of Microsoft’s classic Outlook experience unstable for a measurable number of users, triggering freezes, lingering OUTLOOK.EXE processes, lost Sent Items and a rapid sequence of follow‑up fixes and mitigations from...

A routine January Patch Tuesday update left a significant slice of Windows users temporarily unable to rely on core productivity workflows after the January 13, 2026 cumulative update (KB5074109) introduced regressions that broke parts of classic Outlook and disrupted remote access for some...

Microsoft released an out‑of‑band update on January 17, 2026 that targets a baffling but low‑level sign‑in regression: the password icon can become invisible on the lock‑screen sign‑in options after installing the August 2025 preview (KB5064081) or subsequent updates, and KB5077744 (OS Builds...

A patch released in January 2026 is causing some Windows 11 PCs to restart when users try to shut them down or put them to sleep, and Microsoft has published an emergency workaround while it works on a permanent fix. Background / Overview Microsoft shipped its January cumulative updates on...

Microsoft has confirmed that a recent Windows Update rollout produced an alarming but ultimately incorrect “end of support” banner in Settings that led some Windows 10 users — including those enrolled in Extended Security Updates (ESU) and customers running LTSC/IoT SKUs — to believe their PCs...

Microsoft’s January cumulative for Windows 11, KB5074109, intended to harden Secure Boot and fix NPU power-drain problems, has instead introduced a cluster of high-impact regressions — from intermittent black screens on GPU systems to Outlook POP freezes, Azure Virtual Desktop authentication...

Microsoft has warned that a January security rollup can leave some Windows 11 machines unable to shut down or hibernate, while other recent updates are producing client-side regressions that break Azure Virtual Desktop and remote‑session authentication—an unsettling start to Patch Tuesday for...

Microsoft’s first Patch Tuesday of 2026 has a nasty wrinkle: the January 13 cumulative update (KB5074109) introduced a client-side regression that can prevent the Windows App from completing credential prompts, blocking Azure Virtual Desktop (AVD) and Windows 365 (Cloud PC) connections for many...

Microsoft’s January cumulative update is preventing some users from connecting to Microsoft 365 Cloud PCs and Azure Virtual Desktop sessions, and Microsoft has acknowledged the regression — offering Known Issue Rollback (KIR) and temporary connection workarounds while an out‑of‑band fix is...

Microsoft has warned that a recent update branch that includes KB5019509 can cause enterprise endpoints using DirectAccess to get stuck in a perpetual “Connecting…” state after a temporary network interruption or when roaming between Wi‑Fi access points, and the company has issued mitigation...

Microsoft confirmed that the January 13, 2026 cumulative update KB5074109 introduced a regression that can break Azure Virtual Desktop (AVD) connections on some Windows clients, producing immediate authentication failures; organizations seeing this behavior should pause deployment, apply...

Microsoft has confirmed that installing the October 18, 2022 out‑of‑band update KB5019509 — and certain cumulative updates that followed — can leave enterprise endpoints unable to reconnect to DirectAccess after a temporary network interruption or when switching Wi‑Fi networks, and the company...

Microsoft’s October 2025 cumulative update wave unexpectedly pushed a measurable number of Windows 10 and Windows 11 systems into the BitLocker recovery flow, in some cases combined with a broken Windows Recovery Environment (WinRE) that prevented users from entering their 48‑digit recovery key...

Microsoft's new deep-dive on Known Issue Rollback (KIR) pulls back the curtain on a quietly powerful safety net built into Windows: a targeted, run-time mechanism that can disable a specific change introduced by an update without uninstalling the entire package — keeping devices secure while...

Microsoft's Known Issue Rollback (KIR) is the stop‑gap that lets Windows selectively "flip the switch" on a problematic change without uninstalling an entire cumulative update — a surgical mitigation that preserves security fixes while restoring functionality for affected users and enterprises...

Microsoft has pulled back the curtain on Known Issue Rollback (KIR), the behind-the-scenes mechanism that lets Windows selectively undo problematic non‑security changes delivered in updates—using runtime feature flags, Group Policy templates, and the Windows Update cloud to flip specific...

Microsoft has confirmed a Windows Update bug that caused some Windows 10 PCs enrolled in the Extended Security Updates (ESU) program to display a misleading “Your version of Windows has reached the end of support” banner — even though those systems remain entitled to and are still receiving...

Microsoft has confirmed a display bug that caused some Windows 10 PCs enrolled in the Extended Security Updates (ESU) program — and certain LTSC/IoT LTSC SKUs — to show a startling “Your version of Windows has reached the end of support” banner in Settings → Windows Update, even though those...