I am trying to restore my iPad, using my laptop but its not working. what can I do?

See this support article:--> If you see error 9, 4005, 4013, or 4014 when you restore your iOS device - Apple Support

If the issue still persists, contact Apple Support, using this link:--> Get Support

Regards

Giulio

And the error message is...?

Perhaps one of these support pages will be helpful in resolving the problem.

iOS update and restore errors – Apple Support

If you can't update or restore your iPhone, iPad or iPod touch – Apple Support

You’ll note that error-9 and the associated remedies are explicitly listed within the first link of my initial reply.