Hello just to start by saying I'm nearly completely new to the more in depth situation I've ran into now so please take it easy on me lol. To start with I have a Sony Vaio Model SVE151D11L that had a Hitachi TravelStar 5K750 HD and it began clicking and would randomly shut down on me and the computer was a GREAT one I've had for years and no probs so I decided being I had a ASUS Model D550MA that wasn't so great maybe I could swap hard drives in which I did. I deleted all the partitions on each of them and the HD out of the Vaio I reinstalled into the Asus and reinstalled Windows 10 and got everything updated and it works fine, but when I try to reinstall Windows 10 on the Vaio with the HD out of Asus when I go into BIOS mode it says no HD is found and when I load straight up it'll say Operating System Not Found or Blue Screen Error for PC needs to be repaired and I need the Windows disc or USB. Now if I boot from External from the BIOS and it actually will load and I get to install part of Windows 10 it says it can't load any drives and none show in the list. Also something strange is if I go into Command Prompt it's listed as X:Sources then whatever you type so I'm not really sure what's going on. If anyone has ANY idea or help please let me know and TY.