Antivirus 2009 Causes Hang On Restart

Hi,


I just installed the evaluation version of anitivirus 2009, it requested a restart to finish instalation and now my PC hangs on the Windows XP Logo screen, the blue bar infinately scrolling by. I take it that it placed something in the boot sequence that my computer isnt liking?


I can start in safe mode. Can anyone suggest how to get around this?


Thanks!


Shaun