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Introduction
Windows 11 users recently faced an unusual but frustrating glitch: the Task Manager refused to quit when closed, leaving multiple hidden processes running in the background. This bug not only consumed RAM and CPU resources but also caused noticeable slowdowns, especially on lower-end PCs. With the release of the November 2025 Update (Build 26200.7171/26100.7171), Microsoft has officially resolved this issue, restoring normal functionality and ensuring smoother performance across systems.
Summary of the Issue
The problem emerged after the October 2025 optional update (KB5067036). Many users discovered that closing Task Manager didn’t terminate the application properly. Instead, invisible instances continued running in the background. During internal testing by Windows Latest, 30 out of 100 virtual machines experienced persistent Task Manager processes after closing the app.
Each ghost instance of Task Manager consumed roughly 20–25 MB of RAM and up to 1.5% CPU. While that may seem minimal, repeated use over time compounded the resource drain, particularly impacting users who frequently monitored system performance. PCs with 8GB or 16GB of RAM felt the slowdown most sharply.
The bug originated from a fix in KB5067036 that intended to group certain app processes correctly, like Spotify under File Explorer. However, the patch inadvertently caused the Task Manager to stay active in the background instead of quitting when the Close (X) button was clicked. Microsoft acknowledged the issue, stating that lingering Task Manager instances could degrade system performance if many accumulated over time.
Testing confirmed that opening Task Manager hundreds of times created multiple hidden instances, directly validating the performance impact. Microsoft responded swiftly, releasing the November 2025 Update (KB5068861), which completely addressed the problem. After applying this update, Task Manager now closes normally, and all ghost processes disappear.
Users can check whether their systems were affected by pressing Ctrl+Shift+Esc to open Task Manager, closing it, and then reopening it. If multiple Task Manager processes appear and increase with each opening, the system has the bug. Until the update is installed, manual intervention—ending each Task Manager instance individually—is required.
The November 2025 Update also introduces other enhancements, including a fully customizable Start menu, colored battery indicators, and additional stability improvements. Overall, this update not only fixes the ghost Task Manager bug but also enhances the user experience across Windows 11 devices.
What Undercode Say:
The ghost Task Manager bug highlights a classic case of unintended consequences in software updates. Microsoft’s attempt to refine process grouping inadvertently created a secondary issue affecting millions of users, demonstrating how interdependent system components can lead to cascading performance problems. Each Task Manager instance, while small individually, collectively consumed substantial RAM and CPU cycles, particularly on systems with limited resources.
From an IT management perspective, this glitch underscores the importance of staged deployment and rigorous virtual machine testing. Windows Latest’s experiment with 100 VMs provided a statistically relevant sample, confirming that even seemingly minor background processes can scale into noticeable system slowdowns. This kind of proactive testing should become a standard practice for high-impact OS updates.
The fix in KB5068861 is effective, but the scenario also serves as a cautionary tale about cumulative minor errors. Users with heavy multitasking workflows or lower-end hardware were disproportionately affected, pointing to the need for performance-conscious patch development. Beyond the Task Manager, the update introduces UX improvements like a customizable Start menu and visual indicators for battery status, signaling Microsoft’s continued focus on both performance and user experience.
Analytically, this incident could influence how enterprise IT departments handle update rollouts. Rather than applying updates system-wide immediately, administrators may adopt a phased approach, testing each update in controlled environments to catch hidden bugs. Additionally, automated monitoring scripts could flag unusual process accumulation, providing real-time alerts to prevent performance degradation.
From a software engineering perspective, this bug also reflects the trade-offs between fixing specific issues and maintaining overall system stability. In the KB5067036 patch, process grouping fixes introduced a background process anomaly. The resolution in KB5068861 demonstrates responsive patch management and user-centric troubleshooting, restoring system reliability while maintaining forward-looking features.
Overall, the Task Manager bug and its resolution illustrate the balancing act Microsoft must maintain: addressing legacy bugs, improving functionality, and enhancing user experience without introducing new system-level issues. It’s a real-world example of why comprehensive QA, user feedback, and adaptive patching are critical in large-scale operating systems.
Fact Checker Results:
✅ Windows 11 November 2025 Update (Build 26200.7171/26100.7171) fixes Task Manager bug.
✅ Ghost Task Manager instances consumed RAM and CPU, affecting performance.
✅ Manual process termination was required for users who delayed the update.
Prediction:
📊 Users who quickly update to the November 2025 patch will experience smoother Task Manager performance and overall system stability.
📊 Enterprise IT teams may adopt more cautious rollout strategies to avoid similar cascading bugs in future updates.
📊 Continued UX improvements, such as Start menu customization and visual indicators, will drive higher adoption rates for Windows 11 2025 builds.
🕵️📝✔️Let’s dive deep and fact‑check.
References:
Reported By: www.windowslatest.com
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