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When I need to know the seconds in Windows 10, I need to click on the clock to open it, but that is annoying if I need to do it multiple times or I need to wait for the next minute to be reached.

I would like the taskbar clock to have the seconds (HH:MM:SS) instead of only hours and minutes (HH:MM).

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  • In an old version of Windows (possibly 95), MS discovered that updating the taskbar clock with seconds used a high amount of CPU. They took it out for performance reasons originally. Not a big problem nowadays. May 29, 2018 at 19:04

2 Answers 2

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I found the answer here and is really simple:

  1. Open the Registry Editor by typing regedit in the start menu
  2. Navigate to the key HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
  3. Right-click in the Advanced key in the left pane, go to New and then click in DWORD (32-bit) Value.
  4. Name the value ShowSecondsInSystemClock and press Enter.
  5. Double-click the value you just created in the right pane, enter a value of 1 and click OK (You can leave it Hexadecimal).
  6. Sign out or restart the computer.
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    You can restart Windows explorer using Task Manager instead of restarting PC. Sep 5, 2018 at 21:42
  • Hey Edu, can you update your answer to include @VadimOvchinnikov 's suggestion. It worked for me.
    – Kiran
    Oct 26, 2023 at 11:43
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It is possible to enable seconds by using this method.

You can use an open-source software called T-Clock.

It also has some useful and handy window management features, so it is a solid toolbox. http://i1-win.softpedia-static.com/screenshots/T-Clock-Redux_1.png

You can customize the date/time format by using advanced clock format.

http://i.computer-bild.de/imgs/2/4/8/0/8/1/4/Screenshot-3-T-Clock-Redux-487x439-0c9927541867a725.jpg

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