iTunes 10.5 wont get past agreement screen! Please Help!

I am running windows 7.

So I am trying to get iOS5 installed, first I upgraded itunes, and when I try to launch it, the agreement box pops up. I click accept and iTunes doesnt come up at all! When I reclick on the iTunes icon, it pops up the agreement box. I click "Agree" and iTunes just closes.

I tried uninstalling itunes, then downloading the installer from apples website, then reinstalling it. The same problem occurs, I cant get past the agreement box to launch itunes.

I dont get what the problem is... I really hope somebody can help me out.

I tried restarting. Uninstaleld, then reinstalled itunes. Right click on tunes, run as systems administrator and tried renaming the iTunes Library.ltl file. Now clicking on the iTunes button just hangs and nothing comes up.