OSX 10.8 won't boot - reinstallation ?

Hi

I have a MacBook Mid 2009 running OSX 10.8 with BootCamp (Windows 7). For some reason I don't know OSX wont boot, it started booting but then only spinnning wheel is displayed for infinity. I have tried to boot into save mode, do a HD check recovery & permissions recovery, also boot into single user mode but OSX just won't start.

My question is if I did a reinstall of OSX system, will BootCamp partition with Windows 7 work after reinstallation, or do I need to install all again (bootcamp & Wndows system)?

Thank you in advance

Regards

Mike