How to disable “There are unused items on your desktop”

Right-click on your desktop background and select [Properties].

From the “Display Properties” window, select the [Desktop] tab.

Select the [Customize Desktop…] button at the bottom.

Uncheck the “Run Desktop Cleanup Wizard every 60 days” box and click the [OK] button, and then click the [OK] button on the display properties window.

That should be it!