With Windows, everything happens at the same time. Its many different parts run around like hamsters with an open cage door.
Programs cover each other up on-screen.
They overlap corners, hiding each other's important parts. Occasionally, they simply disappear. Be prepared for a bit of frustration when things don't behave properly. You may be tempted to stand up, bellow, and toss a nearby stapler across the room. After that, calmly pick up this book, find the trouble spot listed in the index, and turn to the page with the answer.