If you are not a developer, you probably will not need to load or unload a Component Object Model (COM) add-in because most COM add-ins include an install and uninstall program that loads or unloads the add-in for you.
To load an add-in, select the check box next to the add-in name in the Add-Ins available list. If the add-in you want isn't in the Add-Ins available list, click Add, locate the add-in, and then click OK.
To unload an add-in from memory but keep its name in the list, clear the check box next to the add-in name.
To remove an add-in from the list and also from the list of registered add-ins in the registry file, select its name, and then click Remove.
Note Unloading or removing an add-in doesn't remove it from your computer.