You should still be able to run a program in compatibility mode though. With Windows 7, you can choose to run programs in compatibility mode without having, or using, Windows XP Mode, itself. Right click on a file and choose Properties, then go to the Compatibility tab. Have you tried using File | Open from Access to try an open it? Another thought is to right click on an MDB and choose Open With..., then choose Access as the program and make sure to check Always use this program to open the specified file type.