Answer:
I'm found on Windows yet I am just a decoration. What am I?
I am needed for most animals and hardcover books
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
I am mother and father, but never give birth or nurse. I'm rarely still, but I never wander. What am I?
Which word in the dictionary is spelled incorrectly?
No matter how little or how much you use me, you change me every month.