Hi guys I have a HP envy laptop, which I recently did a full restore to factory settings. The windows 8 was preinstalled on my laptop and it was activated I had even upgraded to 8.1, however since restoring it back to factory settings it is now saying the activation key I have does not work and to get in touch with the people I bought the laptop from. However, HP technicians have said it is nothing to do with them and i'm not sure how to contact Microsoft about it. There is no activation key at the bottom of my laptop. I was wondering if there is any one here that could help me. Thank you in advance for any help received.