what should I do?

[Windows Central Question]

I have an old HP laptops which now won't open after trying to install windows10

 

[GN_Will]

It will be best if you take it to a repair specialist, they might be able to assist.

 

[shmsnh]

How old is your laptop? What is its configuration?

You can try to either go back to the previous OS or use Windows 10 installation media to proceed.