Bitdefender Internet Security Wizard Has Ended Prematurely

I just installed Visa HP x64 today, and everything was going fine, until I tried to install the x64 version of BD. It wouldn't let me. It will get to the end then roll back its actions near the end. It then says the wizard has ended prematurely.

System specs: Fresh vista x64 install

AMD 5000+CPU

Spybot S&D

edit- also tried with gamesafe x32, 2009 x64, and changing the download location from Program files x64 to program files x86 with no avail. HELP!!!

Thanks in advance!