If your pc or laptop is in need of repair then you need to find a repair company that you trust. If you do have a chance, make sure that you back everything up before taking your computer in for any repairs or upgrades. If your computer has dies then you may be able to ask the repair show to take out the hard drive and either back it up for you or give it to you to plug in to another computer to work. If the fault lies within the hard drive such as a corruption or physical damage to it then this may not be possible. Be very wary about using a company where you have to pack and ship your item off too them, if you do decide to use one of these companies then you need to do plenty of research to find out if they are genuine and to read other peoples’ experiences.
With any company you chose to use, find out if they still charge you if the fault is not fixed and if they offer a warranty on their work. All reputable companies will offer you some sort of warranty so if they don’t, look elsewhere.