Why are you bothered if it is hardware or a software related issue with your HP laptop? All you have to do is take them and leave them at the HP Service Center in Anushakti Nagar to get it fixed quickly without any hassles. The technicians here are completely aware of all the problems and would be able to assist you quickly without causing any delay to their customers.
Take it to the nearest HP Service Center in Mumbai which is now accessible next to your neighborhood and these people at the stores can assist you to answer all your system related queries quickly and efficiently. Figure out the location of the stores and drop your laptops there to get them fixed quickly for all the queries you have on mind without taking too much of a load on you by dropping the laptop at the service center.