On one of those activation screens should be a toll=free number to call in the event of problems.
Try that and explain the problem. They should be able to sort it out there and then.
I have windows XP and i have activated it with a genuine key. However, when i turn on the comp it is asking me to activate my copy of windows, and when i click yes to activate now it takes me to the activation screen and says the i have already activated this copy of windows. I then click ok and it logs me off and i am back to the start again.... help.