Photoshop not open

If the suggestion of @creative explorer doesn't help, try to reset your Photoshop preferences msanually

See here https://helpx.adobe.com/ie/photoshop/using/preferences.html#Manually 

and scroll down to section "Reset Photoshop preferences"

Remember to back up your settings before doing the preference reset

https://helpx.adobe.com/ie/photoshop/using/preset-migration.html

@Shahar_Hazan4995 have you just restart your computer it will completely clear your computer's RAM, which can resolve temporary glitches or memory conflicts that might be preventing Photoshop from opening! It ensures that all processes related to Photoshop—including any lingering, "stuck" processes that aren't showing a window—are completely terminated. This is a more thorough approach than manually ending the task in Task Manager.