Taking off windows 7 from a separate HDD

Hi everyone. I needed to update my bios, i have windows 7 64 bit installed in one HDD, but when i tried to update the bios with an application, it says I need a 32 system. So i installed w7 in a second hdd. I now have the bios updated. Now how can i take off the w7 32? I already formatted the hard drive the 32 bit was installed. But it still shows up on the boot screen. How can i take it off?

Make sure WIndows 7 you want to keep is marked System Active in Disk management and set to boot first (after DVD) in BIOS setup.

If the stray Boot Menu listing still shows up, remove it in msconfig>Boot tab, or by installing EasyBCD 2.0 beta Add/Remove tab.