Disable Task View

In the April 2018 update for Windows 10, Task View was added, which collects a history of activities that you have performed.
If you want to disable this:

• Click the Settings icon in the Start menu
• A Settings window will open:
  • Click on Privacy
  • Select Activity History on the left
  • Untick Let Windows collect my activities from this PC
  • Press the Clear button (under Clear activity history) to clear any existing activity
  • A warning message will appear:
    • Press the Ok button

If you now want to hide the task view button from the taskbar:

• Right click on the taskbar, and click on Show Task View button in the menu that appears