My first inclination was to delete the 32 bit entry, but remembered the warnings of changing the registry while inexperienced.
I am relatively new to using Windows 7, a Kubuntu Linux user for over 20 years, so I thought I should check with experienced people before deleting the 32 bit entry and including a 64 bit entry.
The location of the Registery entry is as follows:
HKEY_LOCAL MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Authentication>LogonUI>Background
The name of the entry is:
OEMBackground REG-DWORD 0x00000001 (1)
My inclination is to want to 'Delete' this entry name, and re-enter as 64 bit. What is the correct conclusion?

Thanks!