Solved icons on taskbar changed. why so?

[Jean11114]

I have windows 7.
I turn on the pc and see that the icons of Origin( a gaming program) and firefox changed. instead of having their default picture they have a different one.
My question is : Why does it happen?

 

[Berton]

Do the programs still work? What do the icons look like? Have you tried right-clicking an icon and looking at Properties then Change Icon button, see if the shortcut finds the correct one?