Startup fails continuously

The launcher starts and after that when i see the mojang logo it will not go to the screen where i can select play. I am getting really sick of it. I play minecraft for around 2/3 years now and this problem is not new. I had this once before and i couldn't fix it so i bought a laptop with windows 10. Then everything was okay and now the whole problem is starting over again. I really want this to be fixed because i don't want to buy a new laptop only for minecraft. I hope this problem will be fixed very soon because i know i am not the only one with this problem. My sister has exactly the same problem as me.
Please fix this as soon as possible.

Sincerely,
Layla