os problem

[vladut420]

serial number [Personal Information Removed]

product number E6H00EA#UUG

guys things are like this.I brought this laptop from Belgium from what i remeber in 2013 with windows 7 pre installed and activated(i had no serial number)   i made the upgrade to 8 then 8.1 and 10 and i operate on windows 10 for about 1 year and then suddenly i had a problem i couldnt do an upgrade. or something like this.I made os recovery from bios to orriginaly date.and now i  can't upgrade to 8.1 and then to 10. i get this error 80070436

[DavidPK]

Hi,

As long as the previous installation of Windows 10 had activated Ok after the upgrade from 8.1, you can just perform a clean installation as detailed in the guide on the following link.  Note: At the activation screen, select 'I don't have a Product key' - Windows will activate automatically once the installation has completed.

http://www.howtogeek.com/224342/how-to-clean-install-windows-10/

Regards,

DP-K