If your system files are corrupted, built-in Windows 11 components, such as Windows Security, will not be able to run.

Closing and reopening Task Manager now spawns extra copies, quickly eating up your system's memory and resources.

Press Windows + I to open Settings. Go to Apps > Installed Apps. In the search bar, type Cortana. When Cortana appears in the list, click the three-dot menu beside it. Select Uninstall and confirm ...