HKLM\SOFTWARE\Microsoft\Office\16.0\Access Connectivity Engine
If you have ever worked with Excel, PowerShell, or SQL Server Integration Services (SSIS), you have likely encountered a cryptic error message involving "The 'Microsoft.ACE.OLEDB.12.0' provider is not registered" or a warning about a "bitness mismatch." access database engine 32 bit
The 32-Bit Enigma: Why You Still Need the Access Database Engine (and When It Breaks) HKLM\SOFTWARE\Microsoft\Office\16
April 14, 2026 Category: Tech Support / Data Solutions or SQL Server Integration Services (SSIS)
If you have Office 2016 or later installed via Click-to-Run (the standard download from office.com), you cannot install the 64-bit Access Engine side-by-side. However, many 32-bit Office installs exist. The 32-bit engine coexists peacefully with 32-bit Office.