ODBC Data Source Administrator: Driver name is an empty string
I had a key in this registry path that was not pointing to anything.  So I removed it.

HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\ODBC.INI

(this is the 64 bit window that pops up)

Realize that there is also a 32 bit window for ODBC that exists for this registry path:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ODBC\ODBC.INI

C:\Windows\SysWOW64\odbcad32.exe

(Yes, even though it says WOW64, it means 32 bit.)