Uninstalled Windows 10 by accident

[itsmaazk]

Whilst trying out Ubuntu, I accidentally uninstalled Windows 10 (I don't know how). Now my laptop says that I don't have an operating system installed. If I reinstall Windows 10 through a CD/USB, will I need a product activation code (bearing in mind that the laptop shipped with Windows 8.1, then upgraded to Windows 10. The laptop came with Windows activated automatically).

Please help. Thanks. 

[DavidPK · Accepted solution]

Hi,

As long as the previous installation of Windows 10 had activated Ok after the upgrade from 8.1, the activation servers will have recorded this so 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

[itsmaazk]

Hi there. Windows 10 did install and activate fine. In fact my laptop was working properly since Windows 10 came out and I upgraded. Then I decided to try out Ubuntu, and managed to uninstall Windows 10. How I miss it. Thanks for your help. I'll post how the new install goes when I try it out. 

[DavidPK]

You're welcome

[itsmaazk]

Installed Windows 10 right now and everything is working fine. Thank you for all your help and the link that you sent was also very helpful.