Hi, A week ago my macbook wouldn't turn on without the safe mode start. Several things weren't working in this mode, and after a lot of searching online I did the turn off - turn on - press alt, cntrl, P, R and it started booting normally. BUT, itunes crashes whenever I try to turn it on and I've tried uninstalling and reinstalling, I've also tried deleting some caches and the flip4mac thing. None of this has worked. My mac is so slow at the moment, and this problem isn't helping. Any ideas? Thanks.