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This is an indication that one of the files making up the virus definitions is damaged or otherwise invalid.

To repair a damaged virus definitions file in Mac OS 8.1-9.x

1 2 3

Open the System folder on your computer. Find the Extensions folder and open it. Open the Norton AntiVirus Additions folder.

4 5

Drag all of its contents to the Trash. Reinstall Norton AntiVirus.

6

Run LiveUpdate and update your virus definitions. This restores the current versions of the items in the Norton AntiVirus Additions folder.

To repair a damaged virus definitions file in Mac OS X v10.1

1 2

Uninstall Norton AntiVirus. Reinstall Norton AntiVirus.

3

Run LiveUpdate and update your virus definitions. This restores the current versions of the items in the Norton AntiVirus Additions folder.

Troubleshooting in Norton AntiVirus for Macintosh Startup problems

Norton AntiVirus reports that a file is invalid when trying to launch or scan, or at startup

See “Installation” on page 23.

See “Installation” on page 23.

Norton AntiVirus cannot find the Norton AntiVirus Virus Definitions file Reinstall Norton AntiVirus.

Norton AntiVirus for Mac OS 8.1-9.x is password-protected and I forgot my password

Uninstall, then reinstall Norton AntiVirus.

In Mac OS 8.1-9.x, how do I prevent Norton AntiVirus from loading first?

Use an extension manager program to change the load order. Items in the Extensions folder load earlier than items in other locations in the System Folder.

Extensions load alphabetically, so changing the first character of the name is another way to change the load order. By changing the name of Norton AntiVirus Auto-Protect, you can change its location in the Control Panels folder of the System folder.

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