I'm running a 2.0 GHz Core Duo MacBook Pro with 1GB of RAM running Mac OS X 10.6.4. Whenever I try to open the Help window my computer locks up, occasionally requiring a hard restart. It doesn't just lock up the help app, the entire system locks up and I can't do anything, if I'm listening to iTunes even the music stops playing. I've tried repairing permissions, checking the drive (which came out as ok), and reinstalling the OS. None of these things helped.