Windows 7 trial?

I downloaded one of the versions of windows 7 released on this website. Problem is, i lost the link to the one i downloaded so I can’t really read what to do about this problem…
I have windows 7 gamers edition or what not, it has like a NVIDIA installer with it.
Problem is, it is on a 30 day trial, how can i fix this and make it genuine without buying a key?
Answer #1
look up removeWAT, it should fix that problem
Answer #2
Get remove WAT or WGA here:
http://www.google.com?t=4738087&highlight=