Answer:
I make everyone blind. You can't see me but I will always come back for you. What am I?
I'm found on Windows yet I am just a decoration. What am I?
I can be swallowed, but I can also swallow you. What am I?
I am so delicate that even mentioning me breaks me. What am I?
What goes all around the world but never leaves its corner?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?