I have a Dell Latitute E6440 laptop and after upgrading Windows to 10 from 7 it now will not boot up. Through Diagnostics I am getting the usual error message that there is an issue with the hard drive. I have tried all the suggested booting types and non seem to work. I presumed that the HDD was finished and I ordered a new one. I checked the connections they all seem to be fine. What is puzzling me is that when I removed the HDD and plugged it into a USB cradle all the files showed up (on a different PC) fine...so is the HDD broken or not?? It is not making any strange noises etc