This article describes performing a clean installation of system software on a Performa computer.

1. Insert the Apple Performa CD and restart the computer.
2. After you hear the startup chime, press and hold the "C" key.
3. Run the Disk First Aid application.
4. Disable the System Folder. To disable the system folder move either the System, or Finder files from the System Folder. Once one or both of these file are removed rename the System Folder to something like "Storage".
5. Restore original software bundle by clicking Restore All Software in the Launcher.
6. Verify the newly installed system software works by restarting your computer from the hard disk.
7. Choose the Chooser from the Apple menu and make AppleTalk active. This eliminates issues from occurring when starting from the Mac OS 8 CD-ROM disc.
8. Insert the Mac OS 8 CD and restart the Performa. After you hear the startup chime, press and hold the "C" key.
9. After the Software Restore procedure is completed, check to see if Megaphone has been installed. If so, you should update your Apple Fax software using the Apple Telecom installer for Serial Modems located on the Mac OS 8 CD. The path to this software on the CD is: Mac OS 8 ->CD Extras ->Apple Telecom ->Serial Modems ->Installer. Open the installer and perform an Easy Install.
10. If your Performa does not include Megaphone, it likely has a GeoPort Telecom Adapter (either internal or external) and you should perform an Easy Install of the Apple Telecom software for Geoport/Express Modems. This installer includes the Apple Phone application, which should not be installed on computers which include Megaphone. The path to this software on the Mac OS 8 CD is: Mac OS 8 ->CD Extras ->Apple Telecom ->GeoPort/Express Modems ->Installer. Open the installer and perform an Easy Install.
11. If you are using an Apple GeoPort modem, you should also update the Telecom software to version 3.1.3, which can be found on the Mac OS 8 CD. The path to this software on the CD is: Mac OS 8 ->CD Extras ->Apple Telecom ->GeoPort/Express Modems ->Net Install ->Apple Telecom Disk 1 ->Installer.
12. Open the installer and perform a custom installation by selecting the appropriate software for your internal or external GeoPort, Fax software, and the Apple Address Book. The reasoning for this is to keep Apple Phone from being installed. Apple Phone and Megaphone conflict so by not installing Apple Phone, you can avoid further issues.