KB2266203 – You cannot view a list in Datasheet view on a SharePoint website after you install the 64-bit version of Microsoft Office 2010. (Thanks Nate)
Error Message:The list cannot be displayed in Datasheet view for one or more of the following reasons:
- A datasheet component compatible with Microsoft SharePoint Foundation is not installed.
- Your Web browser does not support ActiveX controls.
- A component is not properly configured for 32-bit or 64-bit support.The Solution? Download & Install –> 2007 Office System Driver: Data Connectivity Components