The file may have been renamed, moved, or deleted. Microsoft PowerPoint Add-ins (add-in: A supplemental program that adds custom commands or custom features to Microsoft Office.) have a .ppa file name extension (to see the .ppa extension, you may need to turn on the display of extensions in Microsoft Windows). Add-ins are stored by default in one of the following places:

• The Library folder or one of its subfolders in the Microsoft Office/Office folder.

• The Documents and Settings/<user name>/Application Data/Microsoft/AddIns folder.

The administrator for your company's network can designate other locations for add-in programs. See your administrator for more information.

You can reinstall a PowerPoint add-in by using the program that you used to install PowerPoint. To find and load an add-in that isn't stored in one of the default locations, on the Tools menu, click Add-Ins, click Add New, and then locate and select the add-in you want to load.

The network drive may be unavailable. To ensure that you can use the add-in (add-in: A supplemental program that adds custom commands or custom features to Microsoft Office.) when your network is unavailable or your computer is offline, keep a copy of the add-in on your computer.

For the add-in (add-in: A supplemental program that adds custom commands or custom features to Microsoft Office.) to be available on other computers that you use, you must store it on your original computer in the Documents and Settings/<user name>/Application Data/Microsoft/AddIns folder. Check with the administrator for your company's computer systems for more information about working on other computers.

Your administrator may have decided not to make the add-in (add-in: A supplemental program that adds custom commands or custom features to Microsoft Office.) available for installation. In this case, you may need to reinstall Microsoft Office or Microsoft PowerPoint. Check with your administrator for more information.