@urgiv: It sounds like you were installing an Enterprise version of Win8 which relies on the company running a server to keep track of installations and Product Keys. I don't think it will work correctly with the Product Key in your BIOS. If your laptop came with Win8 -- and unless you have Win8 install media matching what came with it -- you are better off trimming the factory installation. You can use this post as general guidance. If you DO have proper Win8 install media matching the Win8 that came with your PC, you shouldn't have any of these problems. Unfortunately Microsoft doesn't make them available for download, unless you have an MSDN/TechNet subscription or are a student. The following links talk about legal ways of obtaining Win8 install media. "Alternative" ways cannot be discussed on the forum: http://forum.notebookreview.com/sam...y-bridge-np900x3e-np900x3f-3.html#post9323404 http://forum.notebookreview.com/samsung/706510-samsung-laptops-bricked-using-uefi-9.html#post9287299 http://forum.notebookreview.com/sam...780z5e-np870z5e-np880z5e-205.html#post9312619 You could also contact Microsoft and/or Samsung and ask for help. You own the Win8 license that came with your PC, so maybe they will help you resolve the activation issue.