oabgen.dll-comes from Microsoft Exchange Offline Address Book Generator. Microsoft exchange is en email server, and an offline address book generator is self-explanatory. But why are you receiving this message when you have already uninstalled Microsoft exchange? The truth is that even when you have completed an installation process for a software it may leave fragments behind.
These fragments cause all kinds of problems and that why it’s a good idea to defragment your registry. This is where ZookaWare PC Cleaner comes in. ZookaWare PC Cleaner is the cream of the crop in registry scanning. Go to their website to learn about their unique guarantee.