Re: can i upgrade my pc to w 10 (it s not genuine )
It has been indicated elsewhere that users without a genuine copy of Windows 7, 8 or 8.1 can be upgraded to Windows 10. However, the non-genuine status of their OS will be carried over once they upgrade to Windows 10 - they will not be "activated". Also, those with a non-genuine copy of 7, 8 or 8.1 will not have received the notification to reserve a copy of Windows 10 (before July 29). Hence, by either using the wuauclt.exe in Admin Command Prompt or the other methods of forcing the update in 7, 8 or 8.1, a user (even without a genuine copy of the OS) should be able to upgrade to Windows 10.
Again, a genuine OS can be upgraded to activated 10, and a non-genuine OS should be able to be activated to non-activated 10.
Additional info: If indeed you were already able to initiate the upgrade process and that you encountered some error and found yourself back to a previous version of the OS, then the information provided by other users (i.e. looking for the License Key for your previous OS version and activating that OS version, and then upgrading again to Windows 10) is the correct way of upgrading to an activated version of Windows 10. The steps are exactly the same - the same steps that you were already able to do before encountering the upgrade error.