Windows 10 - How to Show Seconds in the Taskbar Clock

In the Registry Editor, use the left sidebar to navigate to the following key: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced

Right-click the “Advanced” key in the left pane and select New > DWORD (32-bit) Value.

Name the value ShowSecondsInSystemClock and press Enter.

Double-click the value you just created, enter a value data of 1, and click “OK”.

ou can now close the Registry Editor. You will have to sign out and sign back in again before your changes will take effect.

If you want to undo this change, return here and either delete the “ShowSecondsInSystemClock” value or set its value data to “0”.