What problems re-installing OS

I may have to reinstall my OS. What problems does this cause - i.e what will be deleted from my mac?

Paul:
Re-installation is the ultimate invasive remedy and should be considered an avenue of last resort. It is preferable to try to resolve any issues you have before resorting to re-installing the OS.
That said, when you boot from the install CD you have different options. Only Archive and Install can preserve your User Folder, your settings, and your third party applications which are in your Applications Folder. However, you should have a reliable backup of everything on your HDD you cannot afford to lose, as something can go wrong and you can lose it all, even with Archive and Install
Good luck.
cornelius

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