What I can think of is perhaps that AOL has been removed inproperly.
Please download RegSupreme Pro:
Macecraft Software - Download Windows Maintenance and Registry Cleaning utilities
Run it. It will want to make a backup of your cache, let it. Click on the Registry Cleaner tab, and select Aggressive. When it has finished, click on Select, and choose All. Click on Fix, and let it fix everything that it finds.