If you ever need to quickly hide all of your desktop icons for a web meeting, presentation or such, make use of Windows quick hide / unhide function:
Right click on your desktop > Arrange Icons By > Show Desktop Icons
This way you can always present your desktop in a clean manner, even if it a bit on the messy side.
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Before you hide all your items it might be easier to put the ones you don’t want to show in a folder on your desktop with a non-suspicious name (out of sight). You can then hide the folder if you wish.