windows 8 official installation problem

Hey guys i already have wibdows consumer preview on my laptop and it was doing great then i bought the official windows 8 with serial number so i backed up my laptop and i started the installation , once the setup finished it didnt ask me for serial number or anything
It just showed the win 8 logo and below says getting ready so i went to sleep and woke up with a screen said pc recovery , something went wrong with installion please restart you pc and installation . So i want to restart the installation but the bootmngr wontload and i cant access my pc

Plz help me what should i do

I cannot help you, but I do have to ask:
Where did you buy Win 8?

Rod