I have Bought the HP Pavilion dv6t Entertainment Notebook purchased around 2 years back. I have always wondered about the recovery drive D. Few days back i have to reinstall the windows , After reinstalling, the windows asked for key, i have entered the license key but it is giving the activation error. will someone please help me about this?

one of my friend told me that this key only work on the Copy of windows provided by the HP not the retailer copy. So i have to recover using the Recovery Drive D. but when i press F11 key it is not entering into the recovery manager instead it also gives error.

Solution to any of the above will be highly appreciated.