Photoshop 26.0

Do you have do a fresh install of Photoshop or you you install PS as an update?

Do you got an error message during the installation or during the startup?

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

If this doesn't help try the manual removing preferences files. This is the complete andmot efficient method for restoring Photoshop to its default state. This method ensures all preferences and any user presets which may be causing a problem are not loaded.

1. Quit Photoshop.
2. Navigate to Photoshop's Preferences folder.
   macOS: Users/[user name]/Library/Preferences/Adobe Photoshop [version] Settings
   Windows: Users/[user name]/AppData/Roaming/Adobe/Adobe Photoshop [version]/Adobe Photoshop [version] Settings
   
   Note: The user Library folder is hidden by default on macOS. To access files in the hidden user Library folder, see How to access hidden user library files.
   
   
3. Drag the entire Adobe Photoshop [Version] Settings folder to the desktop or somewhere safe for a back-up of your settings
4. Open Photoshop.
   
   New preferences files will be created in their original location.
    

@Claudia_Gon�alves8533 can you system handle it?

https://helpx.adobe.com/ca/photoshop/system-requirements.html

I would do a clean install of Adobe Photoshop. Use the Adobe Cleaner from Adobe's website (don't ever used third party websites cleaners!). https://helpx.adobe.com/ca/creative-cloud/kb/cc-cleaner-tool-installation-problems.html

And after de-installing, re-install through your adobe.com account.