No. Not that one. Not that one either. I’m actually talking about the CorFlags section in the header of a portable executable image. Wil Peck observed the following error when trying to use the Microsoft Jet OLEDB provider on an x64 machine: The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine The simple solution, as Wil points out, is to change the target of your project to x86 rather than Any CPU so that your build will produce a 32 bit executable. If you have a solution...