This is not the only case!! A lot of laptops with SSD drives lose the complete content of the system drive on the upgrade to Windows 10. It is a bug in the MS upgrade software . If you install Windows 10 clean (no upgrade) verything goes OK. But from there there is no way to activivation, not even with a legal windows 7 or 8 key!!!!! Microsoft must know about this problem because it is widely discussed on forums. But until now there is no respons from Microsoft!! also see: Missing operating system - Windows 10 Forums What happens if I update a laptop manually?
I contacted Asus about my tablet that got bricked while trying to install an earlier beta of Windows 10, and they said I could send the device back to them and have it re-imaged. In the case of the tablet, that was the only option. I can't imagine they wouldn't offer to do the same for a netbook.
I did just that, for a second pass, and it STILL trashed my laptop.... just burn or create a usb with Windows 8.1 using the media tool for that, upgrade to Windows 10 after 8.1 is installed by using that media creations tool for Windows 10. At that point you start reinstalling apps. Everything should be good at that point.
Microsoft was the first company I contacted...Staples however is the one that called it an empty box.It's not bad. It's brand new.Delightful, just delightful.I tried to phone them again earlier this afternoon and spent a total of five hours on hold...