I use fraps on 64bit
EDIT: Sorry was so short a reply i was using my phone there, anyway i am using FRAPS for almost all my recording with windows 7 64bit and have never had a problem, EZVID it is possible to record sounds but it is also just terrible (my personal opinion) but i do use it when iwant to capture everything in the screen.
Only problem i have with FRAPS is it will only record in the game meaning you cant make examples of how to do something video's with it. I think Unfamillia's Tutorial thread in there somewhere he mentions what he uses but i've forgotten what it is, anyway hope that helps