Unable to boot Mac OS after 10.6.5 update

Just a question. Dont know whether its due to the 10.6.5 update. After reboot to windows. I can't log in To my Mac os anymore. It just get stuck at the grey apple logo and bar comes out and loads and it shuts down soon after. In windows when I log on it says that my Mac hdd is corrupted. Mount anyway or cancel.
Anyway my question is can I reformat my Mac hdd and reinstall SL without interfering with my windows partition (boot camp)

Use the Archive and Install, Mac OS X: About the Archive and Install feature, option to reinstall SL. This saves your Home folder. Also it saves your old Home/Library folder in a "Previous System" folder in case there are any preferences or support files of applications that require activation codes or S/Ns.
Repair disk permissions after the reinstall. Then apply the latest SL updater and repair permissions again.
After you're satisfied all is well you can delete that previous folder.
OT

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