Microsoft breaks Task Manager in Windows 11, hard

Let’s take a look at how things are going at Microsoft, whose CEO claimed a few months ago that 30% of their code was generated by “AI”.

After installing Windows Updates released on or after October 28, 2025 (KB5067036), you might encounter an issue where closing Task Manager using the Close (X) button does not fully terminate the process. When you reopen Task Manager, the previous instance continues running in the background even though no window is visible. This results in multiple lingering instances of taskmgr.exe, consuming system resources and potentially degrading device performance. Additional instances appear as “Task Manager” in the Processes tab and as “Taskmgr.exe” in the Details tab. Although the impact is less if Task Manager is opened and closed a few times, many instances accumulated over time can cause noticeable slowdowns in other applications.

↫ The Windows Health Dashboard

Well okay then.