So you're being forced to activate Windows, because you left it unactivated for too long past the grace period, and now you're locked out?
There should be a phone number on the screen. You need to phone it to receive a 54-digit activation code, assuming online activation isn't available to you. You do not have a copy of this code, it is generated at Microsoft's end.
If I understand you correctly, the window you are
NOT seeing is this one, which requires the 25 digit code you have on your card:
It sounds like the window you have is this one, which REQUIRES phone activation: