Is there a DCR-TRV340 driver software for windows vista?

EASY SOLUTION - Take your DCR-TRV340 to Best Buy and ask them for a "fire-wire" cable to fit your camera. Sony stopped supporting USB for this camera a long time ago.

When you hook up your camera with the fire-wire to Vista, at a minimum Vista will want to download your video. Whatever other video processing software you may have will also be shown by Vista...so you can use them or Vista. FIRE-WIRE will solve your problems!

just click at www.sony.com and can dowload the drives from there