Microsoft Access Database engine 2010, did you install the 32-bit or 64-bit?

Wondering which Microsoft Access Database engine 2010 you installed? Can't remember if it was the 32-bit or 64-bit? This can help, open regedit and check the keys:

For 64-bit:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\14.0\Access Connectivity Engine\InstallRoot

For 32-bit:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\14.0\Access Connectivity Engine\InstallRoot