vCenter 4.1 upgrade with vCenter Update Manager

Strange catch in this upgrade. vCenter requires a 64 bit Systen DSN to access the database. Update manager requires a 32 bit DSN. On Windows you cannot create 32bit DSN in the ODBC Data Source Administrator found in the control panel.

Instead you have to create your 64 bit like normal from control panel, and create your 32 bit using:

%systemdrive%\Windows\SysWoW64\Odbcad32.exe

vCenter Update Manager DSN