Is the laptop considered the questioner's sole property, or does she share ownership of it with her siblings, given that her father bought it for her due to her need for it in her studies?

If the father is still alive, he should be asked whether he specifically gifted the dowry (jahaaz) to his daughter or if he bought it for everyone. If the father is not present, a presumption indicating his ownership of the dowry is considered, and reference is made to custom and traditions in this regard, as a gift is established by mutual consent and by what people consider to be a gift. It is advisable to be lenient in this matter with siblings, as their affection is more beneficial.