Hi I am new to this forum and this is my first question. I am trying to get my brothers pc running after about 2 years of no activity. Upon trying to boot for the first time I got a message saying "Reboot and select proper Boot Device". I then found out that in the bios settings the hard drive and SSD that was being used for booting originally were not showing up. I checked the connections and they are good. I then tried to diagnose the issue of the hard drive and SSD so I downloaded a diagnostic software called "Hiren's BoostCD" so I could run some tests. I put the ISO file on a USB drive and when I tried to boot from it I get a message saying Missing Operating System. I then tried to run the same file from a dvd so I burned it and got a message saying "CD Rom Boot Priority : Boot Ready". After this message nothing happens and this is where I am stuck. I think it may have something to do with the fact that the pc was booting from an SSD before but I'm not sure. Also for a split second the latter message says "CD Rom Boot Priority: 35" and then changes to "CD Rom Boot Priority: Boot Ready". Any advice would be greatly appreciated. Thanks