How can I recover a laptop that crashed when booting up

What were the results of disinfecting the HD? Are you following the steps in the tutorial? It may not repair if infected.

It didn't seem to help doing following the steps ..

When you won't even answer with the results of the first step of the tutorial, then it usually means someone is not willing to do the work.

Let us know if you decide you want to cooperate as if so we can always get it running, one way or the other.