How to Clear Clipboard in Windows 10
The most recently cut or copied material remains on your Clipboard even after you paste. Windows 10 clipboard will automatically get cleared when you restart your PC. If you want to manually clear windows clipboard, you can do it in the System settings pane.
Open Windows settings (keyboard shortcut: Windows logo key + I), go to System then select Clipboard.
Click on the Clear button under the Clear clipboard data section, as shown in the above screenshot.
Alternatively, if clipboard history has been enabled, press Windows log key + V key to open clipboard history. Then, click on the more button (the button with three dots on it) under one of the items and click: "Clear all" to remove everything.
This will remove everything except pinned items. To remove a pinned item from the clipboard, first you need to unpin the item.