I dont know what I did but now I cannot have google chrome window open at the same time as word or skype. I dont think that its only about google chrome. If I am on goggle chrome and click on skype for example a grey small box briefly appears in the middle of the screen that has four squares in the middle and an arrow appears in the box. It's like there are two screens with different programs attached to each and I can switch between them. How do I switch it back to normal.