To hide or disable the Task View button on the Windows taskbar, you need to turn off the “Show Task View button” option in Taskbar settings.

Quick answer

On Windows 10 or 11:

  1. Right‑click an empty area of the taskbar.
  2. Click Taskbar settings (or Settings → Personalization → Taskbar).
  1. Find the Task View or Show Task View button toggle.
  2. Turn this toggle Off to hide/disable the Task View button.

This selection is what hides/disables the Task View button from the taskbar.