All Layers Changing when only one should

I have installed Photoshop CS6 and now when I create a New Layer all Layers are changing. I have deselected the Background Layer and this is not selected. I have also tried to create a New Layer and deselect all the others, and still ALL the layers are changing. I cannot seem to find an answer to what is the Problem. Hopeing you can help
Thanking you

Hi enna1949. Welcome to the forums. :slight_smile:

Sounds like an annoying issue, but there must be a simple answer to it. Maybe some more information is needed.

ALL the layers are changing.

What do you mean by “they are changing”?