Rebooting in windows mode

I have a CW-Hi12 serial number: 0123456789ABCDEF not even sure if this is correct
Keeps rebooting in windows mode, fine to go to Android, I am a complete novice so need lots of help please.
Thanks
dpidd

Please try to reinstall the system according to your correct serial number (which you can find on the back of the device)

Hello,

I have the correct serial number now
.
I will download to anexternal hard drive but how do I boot my Chuwi to recognise my H/D

Thanks

dpidd

Hello,
I have the correct serial number now.
I will download to my external H/D
How do I start my Chuwi to recognise my external H/D
I assume all files will download in the correct order.
Thanks
dpidd

http://chuwi.mediafire.com/file/509pyxhwbj73n87/windows_installation_system_tutorial.docx/file