Microsoft's recent Windows 11 update KB5067036 has introduced a bug in the Task Manager, causing it to remain open and spawn new instances each time users attempt to close it. Each instance consumes between 20 to 95 MB of RAM and utilizes approximately 0.9% of CPU resources. Users can close multiple instances by clicking "End Task" or using the command line command
taskkill /im taskmgr.exe /f to terminate all Task Manager processes at once. The root cause of the bug is unclear, as it involves a unique management system in the NT kernel that does not follow the traditional parent-child thread structure.