Reinstall Mac OSX on partitioned drive without losing Windows data

Several weeks ago, I used bootcamp to partition my mac so I could install Windows. I set aside about 20GB for Windows. I did it so that I could download a program I need to take the bar exam.
Everything worked fine for about a week. Then my "mac hard drive" started running slowly, freezing and crashing where I had to do manual restarts. The windows hard drive worked fine. Then, my mac hard drive quit starting up completely. It would freeze on the grey/blue screens.
Went to a mac store. The guy didn't know what to do (because he wasn't trained in boot camp) but told me I could try doing an install-without-erasing of Mac OS on the mac hard drive. I did this, and it helped, but did not solve the problem. It still froze/was slow.
Now, the Mac hard drive doesn't completely start up, it freezes after I enter my log in information.
I want to know the following: If I do a complete reset/reinstall of the mac OS on my mac hard drive, will it affect my Windows hard drive? I ABSOLUTELY CANNOT lose the program I have installed on my Windows hard drive. However, I am a bit nervous that if I don't take any action now, whatever problem is occurring may seep over into my Windows hard drive.
Any advice would be wonderful. Thanks!
Message was edited by: khiner
Message was edited by: khiner

you could use [Winclone|http://twocanoes.com/winclone> to clone the winsloth partition to an external, then erase your internal drive, reinstall OS X, have bootcamp assistant create a new partition for winsloth, and finally clone your winsloth installation back.
JGG

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