I've been staring at the task manager (and process explorer) for days, and can't narrow it down to what is causing this.

To troubleshoot and resolve this problem, you can try the following steps:

Set the hour, minute, and second for the online countdown timer, and start it.

Nothing has time to appear inside it.

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It also counts up from a past date.

Create a countdown timer that counts down in seconds, minutes, hours and days to any date, with time zone support.

Convenient timing, fullscreen mode, large selection of sounds, dark/light mode and much more.

Explore countdown & stopwatch for accurate online stopwatch, countdown timers, lap tracking, and more

Alternatively, you can set the date and time to count days, hours, minutes, and seconds till (or from) the event.

Now, a window keeps flashing up and disappearing immediately.

Check to see if the problem is fixed.

Start countdown πŸ•’ timer in just 1 click!

I'm afraid i may have been infected by something.

Customize your countdown and share it with your friends or use it as your homepage.

Silent or choose a sound.

Or count down to a special date and time.

Just installed windows 11.

Experience an online countdown timer with alarm:

123timer is a simple and free online timer with rich features:

Create an online countdown timer for any date.

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Choose a date when the computer was working correctly, and click next to restore the system files from that date.

If not, you can go back to step 1 to either undo the restore process, or try another date.

Press +r to show the run box, type rstrui and click ok.