nival

Hello, I need help on reactivating windows 8 on my Samsung Ativ Book 9 Lite. I installed Ubuntu on my laptop and accidentally removing all the partitions on my laptop's drive. Now, I want to reinstall windows 8 but I encountered problem on activating the Win8. I am seeing an error message that my product key which was embedded in the laptop can not be used to activate Windows 8. I have downloaded many version of windows 8 but none of these works. Looking forward for your help. Thanks!