Knowledge base.Excel 97.
Open a password-protected Excel workbook
This article explains a workaround for the "could not decrypt file" error when trying to open a password-protected Excel workbook.
Jet for Access, Excel and Txt on 64 bit systems
This article explains how to use Jet to connect an application to Access, Excel or Text data files on 64 bit systems.
The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine
There are several reasons this message pops in your application or website. This article tries to clarify each particular situation.