Problème au lancement

You don't answer all my questions and you give us only a little informations. So it's already very difficult to say more.

Does your Photoshop runs in a Virtual Machine?

Which exact version of Windows 10?

Which updates for the PC do you installed? Do you have tried do deinstall it?

Why such old Photoshop v21? Try to update to a newer version like version 25 or 26.

Try to reset the preferences of Photoshop using the steps described here:

https://helpx.adobe.com/photoshop/using/preferences.html#reset-preferences

It's recommended to backup your settings before resetting the preferences.

See here:  https://helpx.adobe.com/photoshop/using/preferences.html#backup-photoshop-preferences

My photoshop run on PC OS windows 10

My version is Photoshop 2020 V21

Just an update of PC before the error occur

Unfortunately you haven't given us any information about your system. Therefore, all proposed solutions are a look into the crystal ball

Does your Photoshop runs in a Virtual Machine? -> This isn't official supported by Adobe.

What has been changed on your system before the error occur?

Which version of operating system do you use?

Which version of Photoshop (and other Adobe software) do you use?

Please give us as much informations as you can. This will help us to try to help you.

"More input -> more output".