Hi,

I recently bought a new Samsung NP900X4D laptop with Windows 8.1 pre-installed on its 128GB SSD.  I then cloned the original SSD (including Windows) onto a new 512GB Samsung SSD, and all seems fine, including all the original partitions, but the laptop won't boot properly from the new SSD when I swap the drives.  Instead I get the following error:

Operating system file missing or contains errors...

Error code: 0xc0000225

File: \windows\system32\winload.efi

So, how can I boot from the new cloned SSD without getting this error?  What's missing, what am I doing wrong, and what do I need to do?

Thanks in advance for any help.

Kelvin