Answer:
Your computer\'s version of white-out.
What is something that can go up quite easily, but is not as easy to bring back down?
What can't you see, hear or feel, until it’s too late. What shadows love, and shopkeepers hate?
We are two brothers on opposite sides of the road, but we never see each other. Who are we?
It belongs to you, but other people use it more than you do. What is it?
Special abilities and brightly colored underwear are all you need to be one of these.