If the instruments still can't be loaded, check to be sure you've typed in the samples folder path correctly. Note that this may take some time: Garritan Personal Orchestra 4 has 54 of these folders.
In the left-hand panel, expand the folder and expand the Banks folder.In the Edit String window, change the Value data field to match the current location of the library's samples folder.In the right-hand panel, double-click the key with the name 'sample_dir.'.Carefully navigate to the following registry key:.
If you're not familiar with or not comfortable with modifying registry keys, you may want someone to assist you in person. This task involves making adjustments to your computer's registry, which contains important data that controls your computer's operation. You can edit the product-specific registry key to point it to the right location.