Have you clicked on the USB device in the device manager and selecting updated the driver, pointing to - C:\Program Files (x86)\arduino-1.0.6\drivers - (or your folder on your computer) then press enter?
The procedure you went through I did yesterday and things worked on my 64 windows 7.Maybe try to re install everything.
Can you post a link to the board you are using? Sometimes people have clones and sometimes copies, but seeing the link to the board you actually bought can either answer questions or clear things up.
Unless of course you got the one with an FTDI chip on it, in which case... have you tried the latest drivers from the FTDI website?