Hi, i purchased a DELL LATITUDE 7390 from EBAY (IN GOOD FAITH) in Oct '19. Laptop worked perfectly for 3 months then went to blue screen with a message saying it was frozen and to contact BTS UNFREEZE DEVICES. I did this then and basically got nowhere after some correspondance with a person who i don't know represented or anything of note for that matter. I still have the laptop but it is still in this state. Can anyone help/advise/assist me in rectifying the laptop for use again....thanks in advance.