Answer:
Your computer\'s version of white-out.
Rotten trees and Jack-O-Lanterns have this characteristic in common.
It's been around for millions of years, but it's no more than a month old. What is it?
It weighs next to nothing but no one can hold it for long. What is it?
What has a neck but can't swallow?
When is it bad luck to see a black cat?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?