A good site for audio is Japanese Pod 101. They used to be for free download, but I'm pretty sure things have changed around now. Worth a look though. They have a Japanese speaker and an English speaker and they just translate between the two and explain sentence structure and stuff.
Oh and Kana charts:
Hiragana and Katakana Practice - Real Kana
[It allows you to practice them aswell, but you can just reference them as normal on there.]
No idea about Vista, I have XP.