Codec for Windows Vista x64 bit
Here is a good codec for your Windows Vista 64 bit version where you don’t need to install any other codec. Often you get their player, etc. but here it is deselected by default. If you want to install it on a media center (Vista Utimate x64 bit), it will also work. Remember that this codec does not work for a Windows system with x32 bit.
Download it here: Winodws Vista x64 bit codec