Installing Windows 7 was over in a few minutes, but I had some problems with the activation. After some googling I found the answer in one of the comments to a post in Mikael Sands blog.
If you get an error 0xC004F074 when trying to activate a enterprise edition Windows 7, check that your date and time settings are correct! For some reason my date setting was wrong and correcting it enabled Windows 7 to communicate with the KMS.
I need an activation key to activate my wndows 7 enterprise, Please give me and Help me….
Check the manual that came with the box
not activat my product