Depends what the mobo is, because if it's got a UEFI BIOS, you cant use secureboot or UEFI.
Since 32 bit doesnt support either of them.
Otherwise you'll have to change both of them everytime you boot into 32 bit windows
Unless you change it to Legacy in the BIOS
And the other prob will be the ram. if you've got more than 4 GB, 32 bit only supports up to 3.25 - 3.5 GB