I've tried over 30 times to install it, crashes every single time

. Any idea what is the cause of this? I don't know if this is related to SP2, but until I installed it, everything worked as a charm. I even run vista diagnostic tool (health report), everything seem in order:
Generate A System Health Report In Vista :: Mysticgeek’s Realm
I'm running out of ideas.
Cheers,
Miki