Power Macintosh: "PowerPC Finder Update" Error Message

After reinstalling system software on a Power Macintosh, the following message is displayed:

"The system extension PowerPC Finder Update cannot be used."

This message is a result of some corruption in the Finder Preferences file. The solution is to delete the Finder preferences file and have the Macintosh create a new Finder preferences files. This can be achieved by following these steps:

2. Open the Preferences Folder

3. Move the Finder Preferences file to the trash

4. Choose Restart from the Special menu

5. After restart, empty the trash.

Upon reboot, the operating system will recreate a new default Finder Preferences file and the error should not longer occur. After this, it may be necessary to reset some of the Finder settings using the Views control panel.