When I was 12 years old, my parents have told me that they're going to buy me a MacBook Pro if I didn't cry for computer related issues when they were away. However I did, and I have told my baby sitter and my sister not to tell my parents about it. And now, I no longer use my MacBook Pro and is it haram? Is the online accounts created on that laptop Haram? Should I delete those accounts (inc. my Facebook)?
Supposing you have no problem using your laptop now,
Do I have to delete my online accounts which I have created on that laptop though?
Let me make a couple of analogies.
If you made an important file with your laptop in the past, do you have to delete it now? I really don't think so.
If you learned a skill with your laptop, should you make yourself forget this skill? Definitely not.
So, I don't think there is any need to undo anything you did in the past with your laptop.