As the issue may be coming from your environment, and because the steps in one of the Microsoft KB article require you to edit the registry; please engage your IT team before you follow them.
- If the data source is a Microsoft Office 2010 file (.xslx or .accdb), install the 32-bit version of the Microsoft Access Database Engine 2010 Redistributable from the Microsoft Download Center: http://www.microsoft.com/en-us/download/details.aspx?id=13255.
- If the data source is a Microsoft Office 2007 file (.xlsx or .accdb), install the 2007 Office System Driver: Data Connectivity Components from the Drivers page.
- If your data source is not a Microsoft Office 2007 file, or if installing the 2007 Office System Driver does not resolve the issue, review the following Microsoft knowledge base article: http://support.microsoft.com/kb/209805.
- In Tableau, the Msexc40.dll file causes the issue. Follow the steps in that article to re-register the component with the Windows operating system.