A family of Microsoft relational database management systems designed for ease of use.
Okay, on the custom install for Access did you make sure all features for Access AND the Office Tools and (I can't remember the other option but it has to do with shared Office stuff) were selected and set for RUN ALL FROM MY COMPUTER?
If you did do all of that, you might try going to Control Panel > Add/Remove Programs (or Programs and Features if on Windows Vista or Windows 7) and right click on the MIcrosoft Office or Access depending on which shows and select CHANGE (if Repair isn't available) and when it comes up you should be able to select Repair My Installation.
Give that a try and see if that will help.