I have very limited knowledge and am trying to help my son with his laptop. It has had a No Boot device message for the last couple days. I reseated the hard drive and ran PSA Pre-boot System Assessment resulting in error code 2000-0142 on the hard drive. Assuming we need to replace the hard drive, but have seen some information when researching that indicates it may be windows 8 related. What would you suggest for our next step? Also, he doesn't have a backup, recovery disk, or OS software so any guidance on that front would be greatly appreciated if we need to repair or replace the OS. Thank you for your advice.