Here are some popular Windows keyboard shortcuts you may not know about:-

Windows key + E = Open explorer

Control (Ctrl) + F = Find – will search most applications and browsers for a specific string.

Control (Ctrl) + W = Close down the current application on window on your screen.

Alt + Tab = Switch between windows.

Windows key + M – Minimises all windows.

Windows key + D = Show/hide desktop (alternative to windows key + m).