I have a couple Access 2003 applications that I am trying to work with Access 2007. When I open the access projects up, the status bar is always “Calculating…” and CPU usage is 50%, slowing the PC performance way down. Applications both connect to a SQL server database. Both applications worked perfectly with Access 2003 and no issues with performance and continuous calculating status.

What can I do? Where can I look to find the problem?